Tomographic Quantum Cryptography

Details Tomographic Quantum Cryptography Tomographic Quantum Cryptography

2003-05-05

arxiv.org/abs/quant-ph/0305018v1

Physical Review A, vol. 68, art. 022324 (2003)

Physics

Quantum Physics

REVTeX4, 9 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevA.68.022324

We present a protocol for quantum cryptography in which the data obtained for mismatched bases are used in full for the purpose of quantum state tomography. Eavesdropping on the quantum channel is seriously impeded by requiring that the outcome of the tomography is consistent with unbiased noise in the channel. We study the incoherent eavesdropping attacks that are still permissible and establish under which conditions a secure cryptographic key can be generated. The whole analysis is carried out for channels that transmit quantum systems of any finite dimension.

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