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
Citations
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Journal ArticleDOI
Experimental Bell-State Analysis
TL;DR: In this article, it was shown how perfect quantum correlations occurring in two-photon interference effects can be utilized for the analysis of the so-called Bell states. But the proposed system can give an efficiency as high as η = (1/4) using only linear optical elements.
Journal ArticleDOI
Quantum relays for long distance quantum cryptography
TL;DR: In this paper, the authors investigated the quantum relay, which can increase the maximum distance at which quantum cryptography is possible, and showed that the relay splits the channel into sections and sends a different photon across each section, increasing the signalto-noise ratio.
Dissertation
Quantum information processing in continuous time
Andrew M. Childs,Edward Farhi +1 more
TL;DR: In this article, the authors explore two approaches to designing quantum algorithms based on continuous-time Hamiltonian dynamics, and demonstrate two examples of quantum speedup by quantum walk, a quantum mechanical analog of random walk, and construct an oracular problem that a quantum walk can solve exponentially faster than any classical algorithm.
Journal ArticleDOI
Quantum state discrimination and its applications
TL;DR: In this paper, the authors provide an overview of quantum state discrimination, covering some recent progress, and addressing applications in some selected topics, by showing the ways in which the fundamental results are exploited in applications and vice versa.
Journal ArticleDOI
Quantum aspects of semantic analysis and symbolic artificial intelligence
Diederik Aerts,Marek Czachor +1 more
TL;DR: In this paper, the authors take a closer look at similarities and differences between semantic analysis and quantum information theory and show that modern approaches to semantic analysis if reformulated as Hilbert space problems reveal formal structures known from quantum mechanics.