Experimental Fault-Tolerant Quantum Cryptography in a Decoherence-Free Subspace

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dc.creatorZhang, Q.
dc.creatorYin, J.
dc.creatorChen, T. -Y.
dc.creatorLu, S.
dc.creatorZhang, J.
dc.creatorLi, X. -Q.
dc.creatorYang, T.
dc.creatorWang, X. -B.
dc.creatorPan, J. -W.
dc.date2005-08-08
dc.date2005-08-22
dc.date.accessioned2026-07-07T06:26:54Z
dc.date.available2026-07-07T06:26:54Z
dc.descriptionwe experimentally implement a fault-tolerant quantum key distribution protocol with two photons in a decoherence-free subspace (DFS). It is demonstrated that our protocol can yield good key rate even with large bit-flip error rate caused by collective rotation, while the usual realization of BB84 protocol cannot produce any secure final key given the same channel. Since the experiment is performed in polarization space and does not need the calibration of reference frame, important applications in free-space quantum communication are expected. Moreover, our method can also be used to robustly transmit an arbitrary two-level quantum state in a type of DFS.
dc.description5 pages, 3 figures, Add new references
dc.identifierhttps://arxiv.org/abs/quant-ph/0508069
dc.identifierhttp://arxiv.org/abs/quant-ph/0508069
dc.identifierPhys. Rev. A 73, 020301(R) (2006)
dc.identifierdoi:10.1103/PhysRevA.73.020301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97259
dc.subjectQuantum Physics
dc.titleExperimental Fault-Tolerant Quantum Cryptography in a Decoherence-Free Subspace
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