BIDIRECTIONAL QUANTUM SECURE DIRECT COMMUNICATION IN DRIVEN CAVITY QED

A theoretical scheme of bidirectional quantum secure direct communication is proposed in the context of driven cavity QED. We first present an entanglement swapping scheme in cavities where two atoms without previous interaction can be entangled with a success probability of unity. Then, based on a novel property of entanglement swapping, we propose a bidirectional quantum secure direct communication protocol, in which two legitimate users can exchange their different secret messages simultaneously in a direct way. The probability of success in our scheme is 1.0. This scheme does not involve apparent (or direct) Bell-state measurements and is insensitive to the cavity decay and the thermal field.

[1]  F. L. Yan,et al.  A scheme for secure direct communication using EPR pairs and teleportation , 2004 .

[2]  Zhang Zhan-jun,et al.  Quantum dialogue revisited , 2005 .

[3]  Xia Yan,et al.  Controlled Secure Quantum Communication Using Pure Entangled W Class States , 2008 .

[4]  Zhan-jun Zhang,et al.  The improved Bostrom-Felbinger protocol against attacks without eavesdropping , 2004 .

[5]  Zhang Zhan-jun,et al.  Deterministic secure direct communication by using swapping quantum entanglement and local unitary operations , 2005 .

[6]  E. Knill,et al.  Deterministic quantum teleportation of atomic qubits , 2004, Nature.

[7]  Ping Zhou,et al.  Quantum secure direct communication network with superdense coding and decoy photons , 2007 .

[8]  Zhuo-Liang Cao,et al.  Scheme for implementing quantum information sharing via tripartite entangled state in cavity QED , 2007 .

[9]  L. Ye,et al.  Scheme for teleportation of an unknown atomic state without the Bell-state measurement , 2004 .

[10]  S Osnaghi,et al.  Coherent control of an atomic collision in a cavity. , 2001, Physical review letters.

[11]  Man Zhong-xiao,et al.  Quantum Bidirectional Secure Direct Communication via Entanglement Swapping , 2007 .

[12]  G. Guo,et al.  Efficient scheme for two-atom entanglement and quantum information processing in cavity QED , 2000, Physical review letters.

[13]  F. Schmidt-Kaler,et al.  Deterministic quantum teleportation with atoms , 2004, Nature.

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

[15]  Shi-Biao Zheng,et al.  Quantum logic gates for two atoms with a single resonant interaction , 2005 .

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

[17]  Ming Yang,et al.  Entanglement concentration for unknown atomic entangled states via entanglement swapping , 2004, quant-ph/0411157.

[18]  Zhan-jun Zhang,et al.  Improving Wojcik's eavesdropping attack on the ping-pong protocol , 2004 .

[19]  E. Knill,et al.  Complete quantum teleportation using nuclear magnetic resonance , 1998, Nature.

[20]  Fuguo Deng,et al.  Quantum secure direct communication with high-dimension quantum superdense coding , 2005 .

[21]  G. Agarwal,et al.  Strong-driving-assisted multipartite entanglement in cavity QED. , 2002, Physical review letters.