Time-frequency bases for BB84 protocol

Details Time-frequency bases for BB84 protocol Time-frequency bases for BB84 protocol

2003-09-12

arxiv.org/abs/quant-ph/0309105v1

Physics

Quantum Physics

4 pages revtex, 3 figures

Scientific paper

The bases traditionally used for quantum key distribution (QKD) are a 0 or pi/2 polarization or alternatively a 0 or pi/2 phase measured by interferometry. We introduce a new set of bases, i.e. pulses sent in either a frequency or time basis if the pulses are assumed to be transform limited. In addition it is discussed how this scheme can be easily generalized from a binary to an N-dimensional system, i.e., to ``quNdits.'' Optimal pulse distribution and the chances for eavesdropping are discussed.

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