论文信息 - A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace

A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace

A new quantum secure direct communication (QSDC) protocol is proposed by using decoherence free subspace (DFS) to avoid insecurity of the present QSDC protocols in a quantum noise channel. This protocol makes it easily for Bob and Alice to find eavesdropping in channel because the collective dephasing noise disappears in DFS. The probability of successful attack by Eve in this protocol is smaller than in BB84 protocol. Thus this protocol realizes secure QSDC and is feasible with present-day technology.

Liu Wenyu | Ge Hua | Liu Wenyu | G. Hua

[1] Limitations of practical multiphoton decoherence-free states , 2005, quant-ph/0503120.

[2] A. G. White,et al. Experimental verification of decoherence-free subspaces. , 2000, Science.

[3] Daniel A. Lidar,et al. Decoherence-Free Subspaces for Quantum Computation , 1998, quant-ph/9807004.

[4] Fuguo Deng,et al. Reply to ``Comment on `Secure direct communication with a quantum one-time-pad' '' , 2004, quant-ph/0405177.

[5] K. Boström,et al. Deterministic secure direct communication using entanglement. , 2002, Physical review letters.

[6] P. Kwiat,et al. Experimental investigation of a two-qubit decoherence-free subspace. , 2004, Physical review letters.

[7] D. Bacon,et al. Bell inequalities with auxiliary communication. , 2002, Physical review letters.

[8] M. Teich,et al. Decoherence-free subspaces in quantum key distribution. , 2003, Physical review letters.

[9] Harald Weinfurter,et al. Secure Communication with a Publicly Known Key , 2001 .