Symmetric Autocompensating Quantum Key Distribution

Details Symmetric Autocompensating Quantum Key Distribution Symmetric Autocompensating Quantum Key Distribution

2003-09-04

arxiv.org/abs/quant-ph/0309050v1

Physics

Quantum Physics

4 pages, 2 figure

Scientific paper

10.1117/12.543179

We present quantum key distribution schemes which are autocompensating (require no alignment) and symmetric (Alice and Bob receive photons from a central source) for both polarization and time-bin qubits. The primary benefit of the symmetric configuration is that both Alice and Bob may have passive setups (neither Alice nor Bob is required to make active changes for each run of the protocol). We show that both the polarization and the time-bin schemes may be implemented with existing technology. The new schemes are related to previously described schemes by the concept of advanced waves.

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