fbpx
Wikipedia

Adrian Kent

April 09, 2024

Adrian Kent is a British theoretical physicist, Professor of Quantum Physics at the University of Cambridge, member of the Centre for Quantum Information and Foundations, and Distinguished Visiting Research Chair at the Perimeter Institute for Theoretical Physics.[1][2][3] His research areas are the foundations of quantum theory, quantum information science and quantum cryptography. He is known as the inventor of relativistic quantum cryptography. In 1999 he published the first unconditionally secure protocols for bit commitment and coin tossing, which were also the first relativistic cryptographic protocols.[4][5] He is a co-inventor of quantum tagging, or quantum position authentication, providing the first schemes for position-based quantum cryptography.[6][7] In 2005 he published with Lucien Hardy and Jonathan Barrett the first security proof of quantum key distribution based on the no-signalling principle.[8]

Work edit

Field theory edit

Kent's early contributions to physics were on topics related to conformal field theory. Together with Peter Goddard and David Olive, he devised the coset construction that classifies the unitary highest weight representations of the Virasoro algebra, and he described the Virasoro algebra's singular vectors.[9] In addition, he investigated the representation theory of   superconformal algebras.[10]

Quantum cryptography edit

Kent is inventor of the field of relativistic quantum cryptography, where security of the cryptographic tasks is guaranteed from the properties of quantum information and from the relativistic physical principle stating that information cannot travel faster than the speed of light (no-signalling). In 1999 he published the first unconditionally secure protocols for bit commitment and strong coin tossing,[4][5] relativistic protocols that evade no-go theorem by Mayers, Lo and Chau, and by Lo and Chau, respectively.[11][12][13] He is a co-inventor of quantum tagging, or quantum position authentication, where the properties of quantum information and the no-signalling principle are used to authenticate the location of an object.[6][7]

He published with Lucien Hardy and Jonathan Barrett the first security proof for quantum key distribution based on the no-signalling principle, where two parties can generate a secure secret key even if their devices are not trusted and they are not described by quantum theory, as long as they satisfy the no-signalling principle. With Roger Colbeck, he invented quantum randomness expansion, a task where an initial private random string is expanded into a larger private random string.[14]

Quantum foundations edit

Kent is a critic of the many-worlds interpretation of quantum mechanics,[15][16] as well as the consistent histories interpretation.[17] He has outlined a solution to the quantum reality problem, also called the quantum measurement problem, that is consistent with relativistic quantum theory, proposing that physical reality is described by a randomly chosen configuration of physical quantities (or beables) like the stress–energy tensor, whose sample space is mathematically well defined and respects Lorentzian symmetry.[18] He has proposed Causal Quantum Theory as an extension of quantum theory, according to which local causality holds and the reduction of the quantum state is a well-defined physical process, claiming that current Bell-type experiments have not completely ruled out this theory.[19] He discovered the no-summoning theorem, which extends the no-cloning theorem of quantum information to Minkowski spacetime.[20]

Other work edit

Kent is a member of the advisory panel for the Cambridge Centre for the Study of Existential Risk.[21] He has discussed the mathematics of risk assessments for global catastrophes.[22] He has proposed a solution to Fermi’s paradox, hypothesizing that various intelligent extra-terrestrial civilizations have existed, interacted and competed for resources, and have evolved to avoid advertising their existence.[23][24]

References edit

  1. ^ Adrian Kent, University of Cambridge
  2. ^ Adrian Kent, Centre for Quantum Information and Foundations
  3. ^ Adrian Kent, Perimeter Institute
  4. ^ a b Kent, Adrian (1999). "Unconditionally Secure Bit Commitment". Physical Review Letters. 83 (7): 1447–1450. arXiv:quant-ph/9810068. Bibcode:1999PhRvL..83.1447K. doi:10.1103/PhysRevLett.83.1447. S2CID 8823466.
  5. ^ a b Kent, Adrian (1999). "Coin Tossing is Strictly Weaker than Bit Commitment". Physical Review Letters. 83 (25): 5382–5384. arXiv:quant-ph/9810067. Bibcode:1999PhRvL..83.5382K. doi:10.1103/PhysRevLett.83.5382. S2CID 16764407.
  6. ^ a b US 7075438, Kent, A.; Beausoleil, R. & Munro, W. et al., "Tagging Systems", issued 2006-07-11 
  7. ^ a b Kent, A.; Munro, William J.; Spiller, Timothy P. (2011). "Quantum Tagging: Authenticating location via quantum information and relativistic signalling constraints". Physical Review A. 84 (1): 012326. arXiv:1008.2147. Bibcode:2011PhRvA..84a2326K. doi:10.1103/PhysRevA.84.012326. S2CID 1042757.
  8. ^ Barrett, Jonathan; Hardy, Lucien; Kent, Adrian (2005). "No Signaling and Quantum Key Distribution". Physical Review Letters. 95 (1): 010503. arXiv:quant-ph/0405101. Bibcode:2005PhRvL..95a0503B. doi:10.1103/PhysRevLett.95.010503. PMID 16090597. S2CID 10172188.
  9. ^ Goddard, Peter; Kent, Adrian; Olive, David (1986). "Unitary representations of the Virasoro and super-Virasoro algebras". Communications in Mathematical Physics. 103 (1): 105–119. Bibcode:1986CMaPh.103..105G. doi:10.1007/BF01464283. S2CID 91181508.
  10. ^ Boucher, Wayne; Friedan, Daniel; Kent, Adrian (1986). "Determinant formulae and unitarity for the N = 2 superconformal algebras in two dimensions or exact results on string compactification". Physics Letters B. 172 (1–2): 316–322. Bibcode:1986PhLB..172..316B. doi:10.1016/0370-2693(86)90260-1.
  11. ^ Mayers, Dominic (1997). "Unconditionally Secure Quantum Bit Commitment is Impossible". Physical Review Letters. 78 (17): 3414–3417. arXiv:quant-ph/9605044. Bibcode:1997PhRvL..78.3414M. CiteSeerX 10.1.1.251.5550. doi:10.1103/PhysRevLett.78.3414. S2CID 14522232.
  12. ^ Lo, Hoi-Kwong; Chau, H. F. (1997). "Is Quantum Bit Commitment Really Possible?". Physical Review Letters. 78 (17): 3410–3413. arXiv:quant-ph/9603004. Bibcode:1997PhRvL..78.3410L. doi:10.1103/PhysRevLett.78.3410. S2CID 3264257.
  13. ^ Lo, Hoi-Kwong; Chau, H. F. (1998). "Why quantum bit commitment and ideal quantum coin tossing are impossible". Physica D: Nonlinear Phenomena. 120 (1–2): 177–187. arXiv:quant-ph/9711065. Bibcode:1998PhyD..120..177L. doi:10.1016/S0167-2789(98)00053-0. S2CID 14378275.
  14. ^ Colbeck, Roger; Kent, Adrian (2011). "Private randomness expansion with untrusted devices". Journal of Physics A: Mathematical and Theoretical. 44 (9): 095305. arXiv:1011.4474. Bibcode:2011JPhA...44i5305C. doi:10.1088/1751-8113/44/9/095305. S2CID 118630851.
  15. ^ Kent, Adrian (2010). "One world versus many: the inadequacy of Everettian accounts of evolution, probability, and scientific confirmation". In Saunders, S.; Barrett, J.; Kent, A.; Wallace, D. (eds.). Many Worlds? Everett, Quantum Theory and Reality. Oxford University Press. arXiv:0905.0624.
  16. ^ Bacciagaluppi, G. (2013). "The many facets of Everett's many worlds". Metascience. 22 (3): 575–582. doi:10.1007/s11016-013-9747-9. S2CID 169282065.
  17. ^ Kent, Adrian (1997). "Consistent Sets Yield Contrary Inferences in Quantum Theory". Physical Review Letters. 78 (15): 2874–2877. arXiv:gr-qc/9604012. Bibcode:1997PhRvL..78.2874K. doi:10.1103/PhysRevLett.78.2874. S2CID 16862775.
  18. ^ Kent, Adrian (2014). "Solution to the Lorentzian quantum reality problem". Physical Review A. 90 (1): 012107. arXiv:1311.0249. Bibcode:2014PhRvA..90a2107K. doi:10.1103/PhysRevA.90.012107. S2CID 118540685.
  19. ^ Kent, Adrian (2005). "Causal quantum theory and the collapse locality loophole". Physical Review A. 72 (1): 012107. arXiv:quant-ph/0204104. Bibcode:2005PhRvA..72a2107K. doi:10.1103/PhysRevA.72.012107. S2CID 37937717.
  20. ^ Kent, Adrian (2013). "A no-summoning theorem in relativistic quantum theory". Quantum Information Processing. 12 (2): 1023–1032. arXiv:1101.4612. Bibcode:2013QuIP...12.1023K. doi:10.1007/s11128-012-0431-6. S2CID 9797730.
  21. ^ Centre for the Study of Existential Risk
  22. ^ Kent, Adrian (2004). "A critical look at risk assessments for global catastrophes". Risk Analysis. 24 (1): 157–168. arXiv:hep-ph/0009204. doi:10.1111/j.0272-4332.2004.00419.x. PMID 15028008. S2CID 24836816.
  23. ^ Kent, Adrian (2011). "Too Damned Quiet?". arXiv:1104.0624. {{cite journal}}: Cite journal requires |journal= (help)
  24. ^ MIT Technology Review, Interstellar Predation Could Explain Fermi Paradox, 2011

External links edit

  • Personal website
  • Faculty page at the University of Cambridge
  • Adrian Kent publications indexed by Google Scholar

April 09, 2024
adrian, kent, british, theoretical, physicist, professor, quantum, physics, university, cambridge, member, centre, quantum, information, foundations, distinguished, visiting, research, chair, perimeter, institute, theoretical, physics, research, areas, foundat. Adrian Kent is a British theoretical physicist Professor of Quantum Physics at the University of Cambridge member of the Centre for Quantum Information and Foundations and Distinguished Visiting Research Chair at the Perimeter Institute for Theoretical Physics 1 2 3 His research areas are the foundations of quantum theory quantum information science and quantum cryptography He is known as the inventor of relativistic quantum cryptography In 1999 he published the first unconditionally secure protocols for bit commitment and coin tossing which were also the first relativistic cryptographic protocols 4 5 He is a co inventor of quantum tagging or quantum position authentication providing the first schemes for position based quantum cryptography 6 7 In 2005 he published with Lucien Hardy and Jonathan Barrett the first security proof of quantum key distribution based on the no signalling principle 8 Contents 1 Work 1 1 Field theory 1 2 Quantum cryptography 1 3 Quantum foundations 1 4 Other work 2 References 3 External linksWork editField theory edit Kent s early contributions to physics were on topics related to conformal field theory Together with Peter Goddard and David Olive he devised the coset construction that classifies the unitary highest weight representations of the Virasoro algebra and he described the Virasoro algebra s singular vectors 9 In addition he investigated the representation theory of N 2 displaystyle N 2 nbsp superconformal algebras 10 Quantum cryptography edit Kent is inventor of the field of relativistic quantum cryptography where security of the cryptographic tasks is guaranteed from the properties of quantum information and from the relativistic physical principle stating that information cannot travel faster than the speed of light no signalling In 1999 he published the first unconditionally secure protocols for bit commitment and strong coin tossing 4 5 relativistic protocols that evade no go theorem by Mayers Lo and Chau and by Lo and Chau respectively 11 12 13 He is a co inventor of quantum tagging or quantum position authentication where the properties of quantum information and the no signalling principle are used to authenticate the location of an object 6 7 He published with Lucien Hardy and Jonathan Barrett the first security proof for quantum key distribution based on the no signalling principle where two parties can generate a secure secret key even if their devices are not trusted and they are not described by quantum theory as long as they satisfy the no signalling principle With Roger Colbeck he invented quantum randomness expansion a task where an initial private random string is expanded into a larger private random string 14 Quantum foundations edit Kent is a critic of the many worlds interpretation of quantum mechanics 15 16 as well as the consistent histories interpretation 17 He has outlined a solution to the quantum reality problem also called the quantum measurement problem that is consistent with relativistic quantum theory proposing that physical reality is described by a randomly chosen configuration of physical quantities or beables like the stress energy tensor whose sample space is mathematically well defined and respects Lorentzian symmetry 18 He has proposed Causal Quantum Theory as an extension of quantum theory according to which local causality holds and the reduction of the quantum state is a well defined physical process claiming that current Bell type experiments have not completely ruled out this theory 19 He discovered the no summoning theorem which extends the no cloning theorem of quantum information to Minkowski spacetime 20 Other work edit Kent is a member of the advisory panel for the Cambridge Centre for the Study of Existential Risk 21 He has discussed the mathematics of risk assessments for global catastrophes 22 He has proposed a solution to Fermi s paradox hypothesizing that various intelligent extra terrestrial civilizations have existed interacted and competed for resources and have evolved to avoid advertising their existence 23 24 References edit Adrian Kent University of Cambridge Adrian Kent Centre for Quantum Information and Foundations Adrian Kent Perimeter Institute a b Kent Adrian 1999 Unconditionally Secure Bit Commitment Physical Review Letters 83 7 1447 1450 arXiv quant ph 9810068 Bibcode 1999PhRvL 83 1447K doi 10 1103 PhysRevLett 83 1447 S2CID 8823466 a b Kent Adrian 1999 Coin Tossing is Strictly Weaker than Bit Commitment Physical Review Letters 83 25 5382 5384 arXiv quant ph 9810067 Bibcode 1999PhRvL 83 5382K doi 10 1103 PhysRevLett 83 5382 S2CID 16764407 a b US 7075438 Kent A Beausoleil R amp Munro W et al Tagging Systems issued 2006 07 11 a b Kent A Munro William J Spiller Timothy P 2011 Quantum Tagging Authenticating location via quantum information and relativistic signalling constraints Physical Review A 84 1 012326 arXiv 1008 2147 Bibcode 2011PhRvA 84a2326K doi 10 1103 PhysRevA 84 012326 S2CID 1042757 Barrett Jonathan Hardy Lucien Kent Adrian 2005 No Signaling and Quantum Key Distribution Physical Review Letters 95 1 010503 arXiv quant ph 0405101 Bibcode 2005PhRvL 95a0503B doi 10 1103 PhysRevLett 95 010503 PMID 16090597 S2CID 10172188 Goddard Peter Kent Adrian Olive David 1986 Unitary representations of the Virasoro and super Virasoro algebras Communications in Mathematical Physics 103 1 105 119 Bibcode 1986CMaPh 103 105G doi 10 1007 BF01464283 S2CID 91181508 Boucher Wayne Friedan Daniel Kent Adrian 1986 Determinant formulae and unitarity for the N 2 superconformal algebras in two dimensions or exact results on string compactification Physics Letters B 172 1 2 316 322 Bibcode 1986PhLB 172 316B doi 10 1016 0370 2693 86 90260 1 Mayers Dominic 1997 Unconditionally Secure Quantum Bit Commitment is Impossible Physical Review Letters 78 17 3414 3417 arXiv quant ph 9605044 Bibcode 1997PhRvL 78 3414M CiteSeerX 10 1 1 251 5550 doi 10 1103 PhysRevLett 78 3414 S2CID 14522232 Lo Hoi Kwong Chau H F 1997 Is Quantum Bit Commitment Really Possible Physical Review Letters 78 17 3410 3413 arXiv quant ph 9603004 Bibcode 1997PhRvL 78 3410L doi 10 1103 PhysRevLett 78 3410 S2CID 3264257 Lo Hoi Kwong Chau H F 1998 Why quantum bit commitment and ideal quantum coin tossing are impossible Physica D Nonlinear Phenomena 120 1 2 177 187 arXiv quant ph 9711065 Bibcode 1998PhyD 120 177L doi 10 1016 S0167 2789 98 00053 0 S2CID 14378275 Colbeck Roger Kent Adrian 2011 Private randomness expansion with untrusted devices Journal of Physics A Mathematical and Theoretical 44 9 095305 arXiv 1011 4474 Bibcode 2011JPhA 44i5305C doi 10 1088 1751 8113 44 9 095305 S2CID 118630851 Kent Adrian 2010 One world versus many the inadequacy of Everettian accounts of evolution probability and scientific confirmation In Saunders S Barrett J Kent A Wallace D eds Many Worlds Everett Quantum Theory and Reality Oxford University Press arXiv 0905 0624 Bacciagaluppi G 2013 The many facets of Everett s many worlds Metascience 22 3 575 582 doi 10 1007 s11016 013 9747 9 S2CID 169282065 Kent Adrian 1997 Consistent Sets Yield Contrary Inferences in Quantum Theory Physical Review Letters 78 15 2874 2877 arXiv gr qc 9604012 Bibcode 1997PhRvL 78 2874K doi 10 1103 PhysRevLett 78 2874 S2CID 16862775 Kent Adrian 2014 Solution to the Lorentzian quantum reality problem Physical Review A 90 1 012107 arXiv 1311 0249 Bibcode 2014PhRvA 90a2107K doi 10 1103 PhysRevA 90 012107 S2CID 118540685 Kent Adrian 2005 Causal quantum theory and the collapse locality loophole Physical Review A 72 1 012107 arXiv quant ph 0204104 Bibcode 2005PhRvA 72a2107K doi 10 1103 PhysRevA 72 012107 S2CID 37937717 Kent Adrian 2013 A no summoning theorem in relativistic quantum theory Quantum Information Processing 12 2 1023 1032 arXiv 1101 4612 Bibcode 2013QuIP 12 1023K doi 10 1007 s11128 012 0431 6 S2CID 9797730 Centre for the Study of Existential Risk Kent Adrian 2004 A critical look at risk assessments for global catastrophes Risk Analysis 24 1 157 168 arXiv hep ph 0009204 doi 10 1111 j 0272 4332 2004 00419 x PMID 15028008 S2CID 24836816 Kent Adrian 2011 Too Damned Quiet arXiv 1104 0624 a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help MIT Technology Review Interstellar Predation Could Explain Fermi Paradox 2011External links editPersonal website Faculty page at the University of Cambridge Adrian Kent publications indexed by Google Scholar Retrieved from https en wikipedia org w index php title Adrian Kent amp oldid 1217160879, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.