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Passive switching scheme for two-way quantum key distribution setups

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1 Author(s)
G. P. Temporao ; Centre for Telecommunication Studies, Pontifical Catholic University of Rio de Janeiro, R. Marques de Sao Vicente 225, Rio de Janeiro, Brazil

A simple design for Bob in two-way quantum key distribution schemes that employs only passive linear optical components to perform the necessary switching operations is presented. It is shown that, for some specific protocols and/or practical qubit implementations, the losses in Bob's station can be made negligible, hence increasing the maximum distance for secret key generation.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 7 )