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
Multiparty quantum secret sharing with pure entangled states and decoy photons
TL;DR: In this article, a scheme for multiparty quantum secret sharing of a private key with pure entangled states and decoy photons was proposed, which requires the parties of communication to have neither an ideal single-photon quantum source nor a maximally entangled one, making this scheme more convenient than others in a practical application.
Journal ArticleDOI
Macroscopic entanglement and violation of Bell’s inequalities between two spatially separated quantum dots in a planar photonic crystal system
P. Yao,Stephen H. Hughes +1 more
TL;DR: A medium-dependent quantum optics formalism is presented and applied for describing the exciton dynamics of two spatially-separated quantum dots on-chip, in the regime of coupled-cavity quantum electrodynamics, exhibiting pronounced entanglement over distances of 300 microm and more.
Journal ArticleDOI
Mesoscopic superpositions of vibronic collective states of N trapped ions.
TL;DR: This work proposes a scalable procedure to generate superpositions of motional coherent states and also entangled vibronic states in N trapped ions that may be of interest for quantum information processing and may be used in experimental studies on decoherence.
Journal ArticleDOI
Wigner tomography of two qubit states and quantum cryptography
TL;DR: In this paper, the authors show how the Singapore protocol for key distribution is optimal from this point of view, due to the fact that it is based on so-called symmetric informationally complete positive-operator-valued measure (SIC POVM) qubit tomography which allows the most accurate full tomographic reconstruction of an unknown density matrix on the basis of a restricted set of experimental data.
Journal ArticleDOI
Test of Bell's inequality using the spin filter effect in ferromagnetic semiconductor microstructures
TL;DR: In this article, the entanglement of two electron spins can be detected in the spin filter effect in the mesoscopic semiconductor / ferromagnetic semiconductor/ semiconductor junction.