Journal ArticleDOI
Quantum cryptography based on Bell's theorem.
TLDR
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported, based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment andBells theorem is used to test for eavesdropping.Abstract:
Practical application of the generalized Bells theorem in the so-called key distribution process in cryptography is reported. The proposed scheme is based on the Bohms version of the Einstein-Podolsky-Rosen gedanken experiment and Bells theorem is used to test for eavesdropping. © 1991 The American Physical Society.read more
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Journal ArticleDOI
Insecurity of quantum secure computations
Hoi-Kwong Lo,Hoi-Kwong Lo +1 more
TL;DR: This work shows that all one-sided two-party computations (which allow only one of the two parties to learn the result) are necessarily insecure, and constructs a class of functions that cannot be computed securely in any two-sidedTwo-party computation.
Journal ArticleDOI
Quantum random number generators
TL;DR: This review discusses the current status of devices that generate quantum random numbers, and discusses the most fundamental processes based on elementary quantum mechanical processes.
Journal ArticleDOI
Experimental demonstration of a BDCZ quantum repeater node.
Zhen-Sheng Yuan,Zhen-Sheng Yuan,Yu-Ao Chen,Yu-Ao Chen,Bo Zhao,Shuai Chen,Joerg Schmiedmayer,Jian-Wei Pan,Jian-Wei Pan +8 more
TL;DR: This work realizes entanglement swapping with storage and retrieval of light, a building block of the BDCZ quantum repeater, and establishes the essential element needed to realize quantum repeaters with stationary atomic qu bits as quantum memories and flying photonic qubits as quantum messengers.
Journal ArticleDOI
Quantum key distribution over 25 km with an all-fiber continuous-variable system
Jérôme Lodewyck,Matthieu R. Bloch,Raúl García-Patrón,Simon Fossier,Evgueni Karpov,Eleni Diamanti,Thierry Debuisschert,Nicolas J. Cerf,Rosa Tualle-Brouri,Steven W. McLaughlin,Philippe Grangier +10 more
TL;DR: In this paper, a reverse-reconciliated coherent-state continuous-variable quantum key distribution system is described, with which secret keys are generated at a rate of more than 2 kb/s over 25 km of optical fiber.
Journal ArticleDOI
Observable measure of quantum coherence in finite dimensional systems.
TL;DR: An experimental scheme is presented implementable with current technology which evaluates the quantum coherence of an unknown state of a d-dimensional system by performing two programmable measurements on an ancillary qubit, in place of the O(d2) direct measurements required by full state reconstruction.