NONLOCAL CLONING FOR A STATE NEAR A GIVEN ONE WITH SINGLE-PHOTON INTERFERENCE

A linear optical scheme is proposed for implementing a nonlocal cloning machine which copies a state near a given one with single-photon interference. We combine the advantages of photons and atoms by adopting two three level atoms as the storing qubits and a polarized photon as the flying qubit, and the photon loss events are also considered. With our present scheme, a high-fidelity cloning machine is realized at the expense of the success probability.

[1]  Zheng-Fu Han,et al.  Realizing quantum controlled phase flip through cavity QED (5 pages) , 2004 .

[2]  K. Gao,et al.  Preparation of entangled states of four remote atomic qubits in decoherence-free subspace , 2007 .

[3]  H. Kimble,et al.  Scalable photonic quantum computation through cavity-assisted interactions. , 2004, Physical review letters.

[4]  G. Guo,et al.  Probabilistic Cloning and Identification of Linearly Independent Quantum States , 1998, quant-ph/9804064.

[5]  Guang-Can Guo,et al.  Optical realization of universal quantum cloning , 2000, quant-ph/0006032.

[6]  Zheng Shi-Biao.  Simplified Scheme for Cloning and Telecloning Quantum States near a Given State , 2003 .

[7]  H. J. Kimble,et al.  Robust quantum gates on neutral atoms with cavity-assisted photon scattering , 2005 .

[8]  Nonlocal gate of quantum network via cavity quantum electrodynamics (4 pages) , 2005, quant-ph/0501125.

[9]  Z. Zhou,et al.  One-step implementation of a multiqubit controlled-phase-flip gate (7 pages) , 2006 .

[10]  M Ricci,et al.  Teleportation scheme implementing the universal optimal quantum cloning machine and the universal NOT gate. , 2004, Physical review letters.

[11]  D. Bouwmeester,et al.  The Physics of Quantum Information , 2000 .

[12]  Shao Xiao-qiang,et al.  Quantum Logic Network for Cloning a State Near a Given One Based on Cavity QED , 2008 .

[13]  L. Liang.  Realization of quantum SWAP gate between flying and stationary qubits (4 pages) , 2005 .

[14]  Buzek,et al.  Quantum copying: Beyond the no-cloning theorem. , 1996, Physical review. A, Atomic, molecular, and optical physics.

[15]  Dirk Bouwmeester,et al.  Optimal quantum cloning on a beam splitter. , 2004, Physical review letters.

[16]  Linear optical scheme for implementing the universal and phase-covariant quantum cloning machines , 2007 .

[17]  C. H. Oh,et al.  Experimental quantum cloning with prior partial information. , 2004, Physical Review Letters.