A practically feasible entanglement assisted quantum key distribution protocol

Details A practically feasible entanglement assisted quantum key distribution protocol A practically feasible entanglement assisted quantum key distribution protocol

2003-06-23

arxiv.org/abs/quant-ph/0306156v3

Physics

Quantum Physics

13 pages, 3 figures

Scientific paper

We give an entanglement assisted scheme for quantum key distribution. The scheme requires the maximally entangled 2-qubit state but does not require any quantum storage. The scheme is unconditionally secure under whatever Eve's attack. Given the symmetric noisy channel with uncorrelated noise, our scheme can tolerate the bit error rate up to 26% in the 4-state case and 30% in the 6-state respectively, respectively. These values are higher than those of all currently known two-level-state schemes without using a quantum storage.

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