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European Quantum Electronics Conference (EQEC)

Passive autocompensating quantum cryptography

Zachary Walton, Ayman F. Abouraddy, Alexander V. Sergienko, Bahaa E. A. Saleh, Malvin Carl Teich

Published Nov 15, 2004• 0 citations
Publisher

Abstract

A new quantum cryptography scheme is presented that combines passive detection and autocompensation, two desirable features that have hitherto only been demonstrated in separate implementations. A practical implementation based on a well-known down-conversion source is proposed.
DOI
10.1109/eqec.2003.1314261

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A quantum cryptography implementation is presented that uses entanglement to combine one-way operation with an autocompensating feature that has hitherto only been available in implementations that require the signal to make a round trip between the users. Using the concept of advanced waves, it is shown that this proposed implementation is related to the round-trip implementation in the same way that Ekert's two-particle scheme is related to the original one-particle scheme of Bennett and Brassard. The practical advantages and disadvantages of the proposed implementation are discussed in the context of existing schemes.