Xiongfeng Ma, Mohsen Razavi
A practical scheme for measurement-device-independent quantum key distribution using phase and path/time encoding is presented. In addition to immunity to existing loopholes in detection systems, our setup employs simple encoding and decoding modules without relying on polarization maintenance or optical switches. Moreover, by handling, with a modified sifting technique, the dead time limitations in single-photon detectors, our scheme can be run with only two single-photon detectors. With a phase-post-selection technique, a decoy-state variant of our scheme is also proposed, whose secret key generation rate scales linearly with the channel transmittance.
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http://arxiv.org/abs/1204.4856
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