Search results “Entangled-photon six-state quantum cryptography”
Quantum Entanglement & Spooky Action at a Distance
Does quantum entanglement make faster-than-light communication possible? What is NOT random? http://bit.ly/NOTrandoVe First, I know this video is not easy to understand. Thank you for taking the time to attempt to understand it. I've been working on this for over six months over which time my understanding has improved. Quantum entanglement and spooky action at a distance are still debated by professors of quantum physics (I know because I discussed this topic with two of them). Does hidden information (called hidden variables by physicists) exist? If it does, the experiment violating Bell inequalities indicates that hidden variables must update faster than light - they would be considered 'non-local'. On the other hand if you don't consider the spins before you make the measurement then you could simply say hidden variables don't exist and whenever you measure spins in the same direction you always get opposite results, which makes sense since angular momentum must be conserved in the universe. Everyone agrees that quantum entanglement does not allow information to be transmitted faster that light. There is no action either detector operator could take to signal the other one - regardless of the choice of measurement direction, the measured spins are random with 50/50 probability of up/down. Special thanks to: Prof. Stephen Bartlett, University of Sydney: http://bit.ly/1xSosoJ Prof. John Preskill, Caltech: http://bit.ly/1y8mJut Looking Glass Universe: http://bit.ly/17zZH7l Physics Girl: http://bit.ly/PhysGirl MinutePhysics: http://bit.ly/MinPhys Community Channel: http://bit.ly/CommChannel Nigel, Helen, Luke, and Simon for comments on earlier drafts of this video. Filmed in part by Scott Lewis: http://google.com/+scottlewis Music by Amarante "One Last Time": http://bit.ly/VeAmarante
Views: 2493449 Veritasium
Quantum Cryptography Explained
This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 279947 Physics Girl
6. Entangled states
MIT 8.422 Atomic and Optical Physics II, Spring 2013 View the complete course: http://ocw.mit.edu/8-422S13 Instructor: Wolfgang Ketterle In this lecture, the professor discussed entanglement, entangled states, Bell inequality, etc. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 3796 MIT OpenCourseWare
Quantum Key Distribution in ICS
Quantum Key Distribution (QKD) is based on physics rather than classic information theory. You get a quick, easily understood lesson on entangled photons, happy and sad photons that are truly random, not pseudo-random. The photons can be "random and correlated over a great distance". It's not just theory; it's being tested at SDG&E. Duncan Earl discusses the theory of QKD, and then Adam Crain talks about how this can be used for key distribution in an ICS protocol, using SSP-21 as an example.
Views: 229 S4 Events
24. Entanglement — QComputing, EPR, and Bell
MIT 8.04 Quantum Physics I, Spring 2013 View the complete course: http://ocw.mit.edu/8-04S13 Instructor: Allan Adams In this lecture, Prof. Adams discusses the basic principles of quantum computing. No-cloning theorem and Deutsch-Jozsa algorithm are introduced. The last part of the lecture is devoted to the EPR experiment and Bell's inequality. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 64447 MIT OpenCourseWare
Entanglement Distillation Explained
Scientists all over the world are working towards new methods to realize a unhackable internet, an internet based on quantum entanglement – an invisible quantum mechanical connection as networking links. The greatest challenge is the scaling to large networks that share entangled links with many particles and network nodes. Researchers in Delft and Oxford now managed to distill a strong entangled link by combining multiple weaker quantum links into one. This method is essential to realize a trustworthy quantum network between several quantum nodes. Movie in collaboration with Bruno van Wayenburg.
Views: 3140 QuTech
Quantum Photonics at ICFO: using crystals for quantum memory
We speak to Professor Hugues de Riedmatten about quantum cryptography protocols and storing quantum states in crystals doped with praseodymium ions. The ions are so well isolated from the system that a quantum state mapped from entangled photons can be stored in the crystals for several hours. For more on the latest developments in quantum information processing using nanomaterials, visit the Nanotechnology focus collection at http://iopscience.iop.org/journal/0957-4484/page/Focus-Quantum-Information-Processing
Views: 300 NanotechnologyVideo
Quantum state discrimination with continuous variables_62 Dr Stefano Pirandola
Project Name:Quantum and Nano Computing Virtual centre Project Investigator: Dr. Vishal Sahni (DEI)
Views: 1284 Vidya-mitra
Quantum Communication satellite Micius sends entangled photons to stations 1200 km apart - TomoNews
BEIJING — China is leading the pack in terms of quantum space experiments after the country announced that setting a new distance record for beaming entangled particles from space to Earth. The experiment was conducted from the Quantum Experiments at Space Scale (QUESS) satellite, nicknamed Micius, in reference to a fifth century B.C. Chinese philosopher. It is believed photons travel more smoothly in the near-vacuum of space. Quantum communication relies on a phenomenon known as quantum entanglement, in which particles influence each other, even when separated by great distances. A photon can be split into pairs of entangled photons by a laser beam. The entangled photons influence one another, so that if one photon changes its state, the other reacts instantly by taking up a state relative to the photon. The photons remain entangled even when one is far away. Quantum communication could greatly enhance security, as any interception of the information will necessarily alter the state of the photons, thus giving away the eavesdropper. According to Science, the team produced entangled photons by sending a laser beam through a light-altering crystal onboard the satellite. The photons were sent to two receiving stations in Delingha and Lijiang, 1,200 km apart. Opposite polarization states were measured at the two stations, confirming the entanglement — otherwise known as “spooky action” — was achieved over a record distance. ----------------------------------------­--------------------- Go to https://www.patreon.com/tomonews and become a Patron now TomoNews is now on Patreon and we've got some cool perks for our hardcore fans. TomoNews is your best source for real news. We cover the funniest, craziest and most talked-about stories on the internet. Our tone is irreverent and unapologetic. If you’re laughing, we’re laughing. If you’re outraged, we’re outraged. We tell it like it is. And because we can animate stories, TomoNews brings you news like you’ve never seen before. Visit our official website for all the latest, uncensored videos: http://us.tomonews.com Check out our Android app: http://bit.ly/1rddhCj Check out our iOS app: http://bit.ly/1gO3z1f Get top stories delivered to your inbox everyday: http://bit.ly/tomo-newsletter See a story that should be animated? Tell us about it! Suggest a story here: http://bit.ly/suggest-tomonews Stay connected with us here: Facebook http://www.facebook.com/TomoNewsUS Twitter @tomonewsus http://www.twitter.com/TomoNewsUS Google+ http://plus.google.com/+TomoNewsUS/ Instagram @tomonewsus http://instagram.com/tomonewsus
Views: 5792 TomoNews Sci & Tech
Quantum entanglement imaging
Quantum entanglement imaging, podcast by Nature Links: The paper at Nature: http://www.nature.com/nature/journal/v512/n7515/full/nature13586.html Article at Scientific American: http://www.scientificamerican.com/article/entangled-photons-make-a-picture-from-a-paradox/ There is also an article at National Geographic: http://news.nationalgeographic.com/news/2014/08/140827-quantum-imaging-cats-undetected-photon-science
Views: 9901 funestis
How Does a Quantum Computer Work?
For more on spin, check out: http://youtu.be/v1_-LsQLwkA This video was supported by TechNYou: http://bit.ly/19bBX5G A quantum computer works in a totally different way from a classical computer. Quantum bits or 'qubits' can exist in a superposition state of both zero and one simultaneously. This means that a set of two qubits can be in a superposition of four states, which therefore require four numbers to uniquely identify the state. So the amount of information stored in N qubits is two to the power of N classical bits. Thank you to Andrea Morello and UNSW. For more info, check out: http://bit.ly/17wZ7lt
Views: 3099327 Veritasium
The principles of quantum mechanics from polarization
Looking at photon polarization, the formalism of quantum mechanics is developed. This video focuses on the quantum formalism; other experiments like the double slit experiment might be better suited to explain the highly important quantum dynamics.
Bell's Theorem: The Quantum Venn Diagram Paradox
Featuring 3Blue1Brown Watch the 2nd video on 3Blue1Brown here: https://www.youtube.com/watch?v=MzRCDLre1b4 Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ This video is about Bell's Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn't like "spooky action at a distance"), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and others have managed to extend the theoretical work, and Alain Aspect performed the first Bell test experiment in the late 1980s. Thanks to Vince Rubinetti for the music: https://soundcloud.com/vincerubinetti/one-two-zeta And thanks to Evan Miyazono, Aatish Bhatia, and Jasper Palfree for discussions and camaraderie during some of the inception of this video. REFERENCES: John Bell's Original Paper: http://inspirehep.net/record/31657/files/vol1p195-200_001.pdf Quantum Theory and Reality: https://www.scientificamerican.com/media/pdf/197911_0158.pdf "What Bell Did" By Tim Maudlin: https://arxiv.org/pdf/1408.1826 Bell's Theorem on Wikipedia: https://en.wikipedia.org/wiki/Bell%27s_theorem 2015 experimental confirmation that QM violates Bell's theorem: https://arxiv.org/pdf/1508.05949.pdf https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.250402 Bell's Theorem without Inequalities (GHZ): http://dx.doi.org/10.1119/1.16243 Kochen-Specker Theorem: https://en.wikipedia.org/wiki/Kochen–Specker_theorem MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich
Views: 4223413 minutephysics
The Quantum Experiment that Broke Reality | Space Time | PBS Digital Studios
The double slit experiment radically changed the way we understand reality. To check out any of the lectures available from The Great Courses Plus go to http://ow.ly/QVaz302duhX and get ready to learn about everything from cooking to calculus. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g The double slit experiment radically changed the way we understand reality. Find out what the ramifications of this experiment were and how we can use it to better comprehend our universe. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Previous Episode https://www.youtube.com/watch?v=eJ2RNBAFLj0 The Planck Length and the Origin of Quantum Mechanics https://www.youtube.com/watch?v=tQSbms5MDvY Veritasium and the Double Slit Experiment https://www.youtube.com/watch?v=GzbKb59my3U Is Quantum Tunneling Faster than Light? https://www.youtube.com/watch?v=-IfmgyXs7z8 Comments by: Jason Blank https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13mhf0rcurtybftb23nf3yalruqvx2dm Deisisase https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13uifuzxlr3xvc1022ly1jo4uijfjhgj04 Bike Jake https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z13mcnhbglncgpbc122wgxsabw31xdvqw04 An Imposter https://www.youtube.com/watch?v=_NqbRcwWwPw&lc=z12hyl5z4lvsjdihn04cgbhbsnnivhbgdqw0k
Views: 3612421 PBS Space Time
Quantum Teleportation and Cryptography
Topics covered: Cryptography, OTP and QKD, physical qubits, quantum coin flipping, quantum cloning circuit, Bell state circuit, quantum teleportation circuit.
Views: 1794 Quantum Computing
Some light quantum mechanics (with minutephysics)
The math of superposition and quantum states. minutephysics channel: https://www.youtube.com/user/minutephysics Brought to you by you: http://3b1b.co/light-quantum-thanks And by Brilliant: https://brilliant.org/3b1b Huge thanks to my friend Evan Miyazono, both for encouraging me to do this project, and for helping me understand many things along the way. This is a simple primer for how the math of quantum mechanics, specifically in the context of polarized light, relates to the math of classical waves, specifically classical electromagnetic waves. I will say, if you *do* want to go off and learn the math of quantum mechanics, you just can never have too much linear algebra, so check out the series I did at http://3b1b.co/essence-of-linear-algebra Mistakes: As several astute commenters have pointed out, the force arrow is pointing the wrong way at 2:18. Thanks for the catch! *Note on conventions: Throughout this video, I use a single-headed right arrow to represent the horizontal direction. The standard in quantum mechanics is actually to use double-headed arrows for describing polarization states, while single-headed arrows are typically reserved for the context of spin. What's the difference? Well, using a double-headed arrow to represent the horizontal direction emphasizes that in a quantum mechanical context, there's no distinction between left and right. They each have the same measurable state: horizontal (e.g. they pass through horizontally oriented filters). Once you're in QM, these kets are typically vectors in a more abstract space where vectors are not necessarily spatial directions but instead represent any kind of state. Because of how I chose to motivate things with classical waves, where it makes sense for this arrow to represent a unit vector in the right direction, rather than the more abstract idea of a horizontal state vector, I chose to stick with the single-headed notation throughout, though this runs slightly against convention. Music by Vincent Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 734315 3Blue1Brown
Entanglement Theory may Reveal a Reality we can't Handle
What is entanglement theory? It is a Mystery, and here is a potential solution. But its implications are so paradigm shattering that most scientists refuse to believe it. Maybe we can't handle the truth? Imagine you found a pair of dice such that no matter how you tossed them, they always added up to 7. Besides becoming the richest man in Vegas, what you would have there is something called an entangled pair of dice. You could now separate these entangled dice. You could have your friend Alice take one of these to Macau, while the other one stays with you in Las Vegas. And as soon as you rolled your dice, the other one would always instantly show a number that added up to 7. Since this happens instantly, did your dice communicate at faster than speed of light to Macau? Scientists can create entangled photons, for example, by shining a laser on a nonlinear optical crystal. The Entanglement means that a pair of photons act like a single entity rather than two separate particles. To understand entanglement better, you first have to accept the fact that at the quantum scale, reality is fuzzy. Reality really doesn’t know what it is, until it is measured. This is like a single dice tossed in the air that doesn’t have a distinct face until it lands. When tossed up, it is 1, 2, 3, 4, 5, and 6 all at once. Quantum particles are similar in that they do not have distinct properties until they are measured. Particles such as a photon exists in all possible states simultaneously. But when it is measured, it is in only one state. And if the photon is entangled, this measurement of one particle causes its entangled pair to simultaneously exhibit the opposite state, no matter what the distance is between them. Einstein disliked this idea of one particle influencing the other over long distances so much, he called it “spooky action at a distance.” Einstein believed that the particles carried information about each other at the moment that they were entangled and were close to each other. He thought the properties of both particles were determined locally and carried along from the beginning. So in Einstein’s view, the two dice "knew" what they would show before they were tossed. But in the quantum world, this is impossible, because particles are fuzzy until measured. In 1964 the Irish physicist John Bell devised a test that actually could prove whether information was encoded within the entangled particles or whether the spooky action at a distance was real. He did this by taking advantage of the fact that in QM, measurement affects the thing you are measuring. If information was encoded at the time of particle creation, as Einstein believed, then nothing we do randomly to one particle should affect the other. And what this test found conclusively proved that Quantum mechanics is correct – that Einstein was wrong, and that spooky action at a distance does in fact take place. So are entangled particles communicating instantaneously? Even if the speed was 5 miles per hour faster than the speed of light, it would violate Einstein’s theory of relativity and our picture of reality would completely collapse if this was the case. So most scientists have come to the conclusion that no faster than light communication is taking place. So if no signal is telling these particles how to coordinate their results, what’s going on? There is another real possibility that is not popular among scientists, but that Bell himself proposed, and that is called superdeterminism. And here is how it could solve the mystery of entanglement: Bell proposed the idea of absolute determinism in the universe, the complete absence of free will. Suppose everything in reality is predetermined. It cannot be changed. The reality that you live in has already happened. No matter what you say or do, there is no free will. Our behavior and decisions, including our belief that we are free to choose to do one experiment rather than another, is absolutely predetermined. If this is the case, the mystery disappears. There is no need for a faster-than-light signal to tell particle A what measurement has been carried out on particle B, because the universe, including particle A, already 'knows' what that measurement will be. It is predetermined. Could this be the real reality?
Views: 14451 Arvin Ash
L2.2 Entanglement.
MIT 8.04 Quantum Physics I, Spring 2016 View the complete course: http://ocw.mit.edu/8-04S16 Instructor: Barton Zwiebach License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 23022 MIT OpenCourseWare
Anne Hillebrand: "Superdense coding with GHZ and quantum key distribution ..."
Speaker: Anne Hillebrand (University of Oxford) Title: Superdense coding with GHZ and quantum key distribution with W in the ZX-calculus Event: QPL 2011 (Radboud University Nijmegen) Abstract: Quantum entanglement is a key resource in many quantum protocols, like quantum teleportation and quantum cryptography. Yet entanglement makes protocols presented in Dirac notation difficult to follow and check. This is why Coecke and Duncan have introduced a diagrammatic language for quantum protocols, called the ZX-calculus [11]. This diagrammatic notation is both intuitive and formally rigorous. It is a simple, graphical, high level language that emphasises the composition of systems and naturally captures the essentials of quantum mechanics. In the author's MSc thesis it has been shown for over 25 quantum protocols that the ZX-calculus provides a relatively easy and more intuitive presentation. Moreover, the author embarked on the task to apply categorical quantum mechanics on quantum security; earlier works did not touch anything but Bennett and Brassard's quantum key distribution protocol, BB84. Two of the protocols in [18], namely superdense coding with the Greenberger-Horne-Zeilinger state and quantum key distribution with the W-state , will be presented in this paper.
Views: 505 OxfordQuantumVideo
Quantum Entanglement Animated
**Our new PODCAST: http://DanielAndJorge.com **ORDER our new book: http://WeHaveNoIdea.com How do you make something that has never existed before? Physicists Jeff Kimble and Chen-Lung Hung take us on an exhilarating adventure of exploration. Subscribe: http://www.youtube.com/subscription_center?add_user=phdcomics More at: http://phdcomics.com/tv Recorded and Animated by Jorge Cham: http://jorgecham.com Featuring: Jeff Kimble and Chen-Lung Hung Read the blog post at Quantum Frontiers: http://quantumfrontiers.com/2014/02/10/a-quantum-adventure/#content Produced in Partnership with the Institute for Quantum Information and Matter (http://iqim.caltech.edu) at Caltech with funding provided by the National Science Foundation. #FQXiVideoContest2014
What is a quantum coin toss?
Jade’s video on the quantum prisoner dilemma → https://youtu.be/_kLb1glm6EM Jade’s channel, Up and Atom → https://www.youtube.com/upandatom Quantum coin flipping is the fairest way to flip a coin over the phone. How does it work?! Subscribe to physics girl: https://www.youtube.com/subscription_center?add_user=physicswoman Creator: Dianna Cowern Editing: Dianna Cowern and Jabril Ashe Animations: Kyle Norby Writing: Jade Tan-Holmes Thanks to: Dustin Bates @dustieboots Zach @Z_Frank And Starset! http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl PO Box 9281 San Diego, CA 92169 Music used with permission from Starset
Views: 172789 Physics Girl
24 Quantum Mechanics - Bell state circuit
Bell state circuit
Views: 2211 intrigano
Lecture 1 | Quantum Entanglements, Part 1 (Stanford)
Lecture 1 of Leonard Susskind's course concentrating on Quantum Entanglements (Part 1, Fall 2006). Recorded September 25, 2006 at Stanford University. This Stanford Continuing Studies course is the first of a three-quarter sequence of classes exploring the "quantum entanglements" in modern theoretical physics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University. Complete playlist for the course: http://www.youtube.com/view_play_list?p=A27CEA1B8B27EB67 Stanford Continuing Studies: http://continuingstudies.stanford.edu/ About Leonard Susskind: http://www.stanford.edu/dept/physics/people/faculty/sussk... Stanford University channel on YouTube: http://www.youtube.com/stanford
Views: 958335 Stanford
The postulates of quantum mechanics I: states and state space
Describes the first postulate of quantum mechanics - the postulate which deals with the state of a physical system. Part of a series on "Quantum computing for the determined". The full series is at: http://www.youtube.com/user/mnielsencourses?feature=mhum#p/c/1826E60FD05B44E4
Views: 11239 Michael Nielsen
China sets record for quantum entanglements in space experiments
Contact [email protected] to license this or any News Direct video For story suggestions please contact [email protected] RESTRICTIONS: NONE China has announced that it set a new distance record for beaming entangled particles from space to Earth. The experiment was conducted from the Quantum Experiments at Space Scale (QUESS) satellite, nicknamed Micius, in reference to a fifth century B.C. Chinese philosopher. It is believed photons travel more smoothly in the near-vacuum of space. Quantum communication relies on a phenomenon known as quantum entanglement, in which particles influence each other, even when separated by great distances. A photon can be split into pairs of entangled photons by a laser beam. The entangled photons influence one another, so that if one photon changes its state, the other reacts instantly by taking up a state relative to the photon. The photons remain entangled even when one is far away. Quantum communication could greatly enhance security, as any interception of the information will necessarily alter the state of the photons, thus giving away the eavesdropper. According to Science, the team produced entangled photons by sending a laser beam through a light-altering crystal onboard the satellite. The photons were sent to two receiving stations in Delingha and Lijiang, 1,200 km apart. Opposite polarization states were measured at the two stations, confirming the entanglement — otherwise known as “spooky action” — was achieved over a record distance. RUNDOWN SHOWS: 1. A laser beam cutting a photon in two 2. Depiction of quantum entanglement 3. The photons influence each other even separated by great distance 4. Message sent by quantum communication altered instantly by hacking 5. Micius satellite orbiting the earth 6. Equipment used to generate entangled photons 7. Photons sent to two receiving stations in Tibet 8. Opposite polarization states were measured at the two stations VOICEOVER (in English): “The experiment was conducted from the Micius satellite orbiting 480 km above Earth, as photons travel more smoothly in the near-vacuum of space.” “The team produced entangled photons by sending a laser beam through a light-altering crystal on board the satellite.” “The photons were sent to two receiving stations in Delingha and Lijiang, 1,200 km apart.” “Opposite polarization states were measured at the two stations, confirming the entanglement, otherwise known as ‘spooky action,’ was achieved over a record distance.” SOURCES: Science, News.com.au, Xinhua, CNN, The Washington Post http://www.sciencemag.org/news/2017/06/china-s-quantum-satellite-achieves-spooky-action-record-distance http://www.news.com.au/technology/science/space/china-sets-new-record-for-quantum-entanglement-en-route-to-build-new-communication-network/news-story/e528da0cf68b2e63bbe093cab49ec507 http://english.nssc.cas.cn/rh/rp/201608/t20160818_166583.html http://money.cnn.com/2017/01/23/technology/china-vpn-illegal-great-firewall/index.html https://www.washingtonpost.com/news/monkey-cage/wp/2017/02/21/can-the-chinese-government-really-control-the-internet-we-found-cracks-in-the-great-firewall/?utm_term=.623852792ff9 *** For story suggestions please contact [email protected] For technical and editorial support, please contact: Asia: +61 2 93 73 1841 Europe: +44 20 7542 7599 Americas and Latam: +1 800 738 8377 ----------------------------------------­­---------------------------------------­-­---------------- Next Animation Studio’s News Direct service provides daily, high-quality, informative 3D news animations that fill in for missing footage and help viewers understand breaking news stories or in-depth features on science, technology, and health. Sign up for a free trial of News Direct's news animations at http://newsdirect.nextanimationstudio.com/trial/ To subscribe to News Direct or for more info, please visit: http://newsdirect.nextanimationstudio.com
Views: 1171 News Direct
quantum computing & cryptography using quantum entanglement || curiosaint
this video is about new research in the field of internet security and data communication
Views: 20 CurioSaint !
Chinese scientists make quantum leap in computing
Chinese scientists have built the world's first quantum computing machine, paving the way for this technology to outperform classical, or conventional, computers. Scientists announced their achievement during a press conference in the Shanghai Institute for Advanced Studies of University of Science and Technology of China on Wednesday. Recently, Chinese leading quantum physicist Pan Jianwei, an academician of the Chinese Academy of Sciences and his colleagues, Lu Chaoyang and Zhu Xiaobo, of the University of Science and Technology of China, and Wang Haohua, of Zhejiang University, set two international records in quantum control of the maximal numbers of entangled photonic quantum bits and entangled superconducting quantum bits. Pan said quantum computers could, in principle, solve certain problems faster than classical computers. Despite substantial progress in the past two decades, building quantum machines that can actually outperform classical computers in some specific tasks - an important milestone termed "quantum supremacy" - remains challenging. The test results show the sampling rate of this prototype is at least 24,000 times faster than international counterparts, according to Pan's team. At the same time, the prototype quantum computing machine is 10 to 100 times faster than the first electronic computer, ENIAC, and the first transistor computer, TRADIC, in running the classical algorithm, Pan said. It is the first quantum computing machine based on single photons that goes beyond the early classical computer, The achievement was published online in the latest issue of Nature Photonics this week. Subscribe to us on YouTube: https://goo.gl/lP12gA Watch CGTN Live: https://www.youtube.com/watch?v=L2-Aq7f_BwE Download our APP on Apple Store (iOS): https://itunes.apple.com/us/app/cctvnews-app/id922456579?l=zh&ls=1&mt=8 Download our APP on Google Play (Android): https://play.google.com/store/apps/details?id=com.imib.cctv Follow us on: Facebook: https://www.facebook.com/ChinaGlobalTVNetwork/ Instagram: https://www.instagram.com/cgtn/?hl=zh-cn Twitter: https://twitter.com/CGTNOfficial Pinterest: https://www.pinterest.com/CGTNOfficial/ Tumblr: http://cctvnews.tumblr.com/ Weibo: http://weibo.com/cctvnewsbeijing
Views: 12344 CGTN
Najwa Sidqi- Spin-NANO: Optical microcavities for quantum communication systems?
“Quantum cryptography is a hot topic in the IT and communication field as a safe and completely secure way of exchanging data. This video allows promoting research on single photon emitters and single photon sources as key concepts about quantum cryptography. Microcavities associated to single photon sources like diamonds impurities or quantum dots are mostly investigated as the new generation of reliable and efficient Single Photon sources for quantum communication systems. This research is conducted by H2020 Spin-NANO network, bringing together 14 academics and 7 industrial from 6 European countries, including Helia Photonics for the development of High-Finesse microcavities” “Acknowledgment: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 676108”
SU 20150420+ part 1 Entangled Photons: Einstein's Spooky Action in Quantum Communication and Tele...
Prof. Anton Zeilinger (University of Vienna, Austrian Academy of Sciences) gives the 2015 Robert Hofstadter Memorial lecture on 2015-04-20. (Intro. by Prof. Leonard Susskind of Stanford University) NOTE: You may want to wait for a better video of this talk to be released on Stanford's YouTube channel, later.
Views: 360 tube19880
21. Ion trapping and quantum gates
MIT 8.422 Atomic and Optical Physics II, Spring 2013 View the complete course: http://ocw.mit.edu/8-422S13 Instructor: Wolfgang Ketterle In this lecture, the professor discussed ion traps, quantum computation with ions, etc. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 8046 MIT OpenCourseWare
Understanding Quantum Entanglement - with Philip Ball
Last year, Phil Ball gave a very popular talk at the Ri about quantum mechanics, here's his follow up on quantum entanglement, and our friends Alice and Bob. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Watch the talk that started the conversation: https://www.youtube.com/watch?v=q7v5NtV8v6I --- A very special thank you to our Patreon supporters who help make these videos happen, especially: Alessandro Mecca, Ashok Bommisetti, bestape, David Lindo, Elizabeth Greasley, Greg Nagel, John Pollock, Lester Su, Osian Gwyn Williams, Radu Tizu, Rebecca Pan, Roger Baker, Sergei Solovev, and Will Knott. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter
Views: 154189 The Royal Institution
Quantum Mechanics Lecture 34 of 42: Density operators and Bell states
Welcome to the Khwarizmi Science Society Youtube Channel. The Khwarizmi Science Society (KSS) is a non-profit association aimed at furthering the science culture in Pakistan's educational insitiutions and in the general public.
Views: 831 khwarizmisciencesoc
Atomic & Optical Physics - 5.4.3 - Example entangled states
Atomic & Optical Physics PLAYLIST: https://tinyurl.com/AtomicAndOpticalPhysics Module 5: Quantum States and Dynamics of Photons Unit 4: Entangled Photons Lesson 3 - Example entangled states
Views: 8 Bob Trenwith
Michael Walter. Quantum entanglement and space-time.
In the past decade, a striking picture began to form that the way space-time emerges in quantum gravity is, through the holographic duality, intimately connected to the way quantum bits are entangled in a quantum computer. In this talk, I will give an introduction to this exciting new frontier of research, highlighting how key concepts from quantum information theory such as quantum entanglement, error correction and tensor networks may offer new tools and conceptual insight.
After-gate attack on a quantum cryptosystem
We present a method to control the detection events in quantum key distribution systems that use gated single-photon detectors. We employ bright pulses as faked states, timed to arrive at the avalanche photodiodes outside the activation time. The attack can remain unnoticed, since the faked states do not increase the error rate per se. This allows for an intercept--resend attack, where an eavesdropper transfers her detection events to the legitimate receiver without causing any errors.
Views: 5269 QuantikiVideo
Heterogeneous Computing + Quantum Engineering - EEs Talk Tech Electrical Engineering Podcast #17
Learn about parallel computing, GPUs, and quantum computers! Subscribe! ► http://bit.ly/Scopes_Sub ◄ Electrical Engineering Podcast: https://eestalktech.com Agenda: 0:40 When processor speeds stopped increasing, microprocessor companies started to increase the quantity of cores on an IC 1:44 Now, the increased use of special processing cores is more popular GPUs are examples of this. A GPU is different from an x86 or ARM processor. GPUs handle vector math and matrix math. Originally, they were for processing pixels. But, they use floating point math to calculate pixel values. A GPU is very useful if you have a number of identical operations you have to calculate at the same time. 4:00 GPUs were daughter cards, but recently GPU manufacturers have released low power parts for embedded applications. They have several traditional cores and a GPU.  Now you can build embedded systems to take advantage of machine learning algorithms that would have normally require too much processing power thermal power.  4:50 These are called heterogeneous processors or heterogeneous processors. A heterogeneous processor has different types of cores, and a software architect figures out how to distribute tasks. 6:00 We will start to see heterogeneous processors with multiple types of cores very soon. Traditional processors are best for algorithms on integer + floating point operations where there isn't a benefit to doing more than one thing at a time. A GPU is good for multiple parallel computations, so it's useful when there aren't tight dependency chains. Neither is good at real-time processing. If you have real-time constraints there is a lot of computing required. So, a new type of hardware is necessary. Right now, ASICs and FPGAs fill that gap like we discussed in our other electrical engineering podcast episodes. 9:50 Quantum cores could be on processor boards eventually. Quantum computers that can beat traditional computers will be introduced within the next 50 years, and as soon as the next 10 years. 11:50 Quantum computing is reinventing processing. Quantum computers are going to be best at handling new and different types of problems. 12:50 There is a catalog on the web of problems that would be better for a quantum on a computer than a traditional computer. 13:30 People are creating algorithms for computers that don't exist! The Economist estimated that the total spend on quantum computing research is over $1B per year globally. A large portion of that is generated by the potential of these algorithms and papers. Quantum computers won't completely replace traditional processors. 15:00 Lee - the quantum computing industry is still speculative, but the potential is so great that neither large computing companies nor industrialized countries want to be left behind if it does work out. The promise of quantum computing goes past the commercial industry, it's international and inter-industry. Long whitepapers from different governments lay out their quantum computing research strategy. There's also venture capitalists investing in quantum computing companies. 17:40 Is this R&D public, or is there proprietary information out there? It is a mixture, many startups and companies have software components that they are open source, and claim to have "bits of physics" working (quantum bits, qbits), but there are definitely trade secrets. 19:50 Quantum communication comes down to space lasers! Engineering with quantum effects could become an industry. You can send photons with entangled states. The Chinese government has a satellite that can generate these photons, and if anyone reads them they can tell because the wave function collapsed too soon.  ac Quantum sensing techniques will allow us to develop accelerometers and gyroscopes orders of magnitude more sensitive than what we have now. 21:35 Quantum engineering could become a new field of study. Much like electrical engineering started 140 years ago, electronics engineering started roughly 70 years ago, computer science came out of math and electrical engineering.The birth of quantum engineering could be considered to be some point in the next 5 years or last 5 years. 23:00 Lee's favorite quantum state is the Bell state, which encapsulates much of the quantum weirdness in one small snippet of mathematics. #QuantumComputing #QuantumEngineering #quantumbits #quantumcomputer #GPU #GPUs #processor #parallelprocessing #processing #podcast #electricalengineering #electronics #electricalengineeringpodcast #engineeringpodcast#processor
Views: 859 Keysight Labs
Atomic & Optical Physics - 5.4.2 - Standard entangled states
Atomic & Optical Physics PLAYLIST: https://tinyurl.com/AtomicAndOpticalPhysics Module 5: Quantum States and Dynamics of Photons Unit 4: Entangled Photons Lesson 2 - Standard entangled states
Views: 6 Bob Trenwith
Topological States of Quantum Condensed Matter: Duncan Haldane
F. D. M. Haldane (Princeton University) presents at the Fred Kavli Special Symposium on Quantum Matter & Quantum Information at the APS March Meeting 2017 in New Orleans, LA. View abstract below. ------------------------------------------------- Topological States of Quantum Condensed Matter ------------------------------------------------- Over the past three decades or more, it has slowly emerged that many unexpected properties of the ground states of certain condensed matter systems are protected by robust non-trivial topological properties of their quantum entanglement, with consequences such as characteristic inevitably-present edge states. Early work exposed such properties in one and two-dimensional systems and the discovery of 3D topological insulators finally completed dimensional coverage. Interest in topological states has grown as some of them are thought to be potential platforms for quantum information processing. I will describe some selected examples of topological states of matter and the history of their discovery.
Views: 8117 APS Physics
Gilles Brassard: Information is the key!
Most physicists take it for granted that the experimental violation of Bell’s inequality provides evidence that it is not possible to completely describe the state of a physical system in terms of purely local information when this system is entangled with some other system. We disagree. Provided we redefine appropriately what is the information-theoretic state of a quantum system, it becomes possible to recover the whole from the description of its parts. This is in sharp contrast with the standard formalism of quantum mechanics in which the density matrix provides all there is to say about the state of a system. According to our formalism, there is no need to invoke supernatural nonlocality in order to explain everything standard quantum mechanics tells us that we can observe. We show, however, that this is inconsistent with the usual belief held among Everettians that the universal wavefunction can be taken as the complete representation of reality. Inspired by Plato and Kant, we introduce and contrast the notions of noumenal and phenomenal states of physical systems: the former corresponds to the complete but unknowable state of the system and the latter to what can be perceived about it with the help of arbitrary technology. We exhibit an explicit epimorphism from the former to the latter, which explains the relationship between all that there is and all that can be apprehended. Joint work with Paul Raymond-Robichaud. Gilles Brassard, Université de Montréal, Computer Science Information-Theoretic Interpretations of Quantum Mechanics: 2016 Annual Philosophy of Physics Conference June 11-12, 2016 Visit http://philphysics.uwo.ca for conference details. Visit the Rotman website for more information on applications, events, project descriptions and openings. http://www.rotman.uwo.ca Follow The Rotman Institute on Twitter: https://twitter.com/rotmanphilo Like The Rotman Institute on Facebook: https://www.facebook.com/RotmanInstitute Subscribe to our channel: https://www.youtube.com/user/rotmanphilosophy
Bing Qi: Continuous-Variable Quantum Key Distribution with a ‘Locally’ Generated Local Oscillator
QCrypt 2016, the 6th International Conference on Quantum Cryptography, held in Washington, DC, Sept. 12-16, 2016. Web site: http://2016.qcrypt.net/
Views: 279 QuICS
Preparation of Coherent and Entangled Quantum States by Dissipation and Decay - Prof. Klaus Moelmer,
Preparation of Coherent and Entangled Quantum States by Dissipation and Decay, a lecture by Prof. Klaus Moelmer, of Aarhus University in Denmark. This lecture was given during the conference QUEST - Quantum Entanglement Science & Technology, held by Bar-Ilan University's Physics Department in June 2017.
Views: 176 barilanuniversity
PSW 2337 Quantum Entanglement-Einstein's Spooky Action | James Franson
Friday, October 24, 2014 James Franson, Professor, Department of Physics University of Maryland (UMBC) Quantum mechanics predicts many effects that may seem impossible from our ordinary view of the world. One of these is the existence of entangled states of two distant particles. The fundamental implications of entanglement were discussed along with some of the implications.
Views: 364 PSW Science
What is Quantum Mechanical Spin?
This video extends How Do Quantum Computers Work: http://youtu.be/g_IaVepNDT4 Prof. Morello explains why spin does not mean the particle is actually spinning. Subatomic particles like the electron, neutron, and proton have spin, which means they act like tiny bar magnets. This can be used in quantum computing applications. We thank the UNSW School of Physics Demonstration Unit for providing the double pendulum.
Views: 379250 2veritasium
Quantum Spin - Visualizing the physics and mathematics
Quantum spin states explained with 3D animations. My Patreon page is at https://www.patreon.com/EugeneK
Entanlgment animation
Animation illustrating the phenomenon of entanglement when a photon strikes a beamsplitter.
Views: 3738 qaplive