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Quantum State Transfer for Two Atoms with a Single Resonant Interaction

Communications in Theoretical Physics 2007年第5X期48卷 831-833页

作者： WU Tao ni zhi-xiang YE Liu Department of Physics Fuyang Teachers College Fuyang 236041 China School of Physics & Material Science Anhui University Hefei 230039 China

We present a scheme for transferring an unknown atomic entangled state with a single resonant interaction. This scheme only requires a single resonant interaction of two atoms with a cavity mode and does not use the cavity mode as the memory. Thus the scheme is very simple and the interaction time is very short, which is important, in view of decoherence. Quantum state can be directly transferred from two atoms to another two at, oms with a successful probability of 100 percent.

关键词： transfer cavity QED resonant interaction quantum entanglement

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Transferring of a Two-Mode Entangled State Between Two Cavities via Cavity QED

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Communications in Theoretical Physics 2007年第3期47卷 451-453页

作者： WU Tao ni zhi-xiang YE Liu School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of Physics Fuyang Teachers College Fuyang 236032 China

We propose a scheme for transferring of a two-mode entanglement of zero- or one-photon entangled states between two cavities via atom-cavity field resonant interaction. In our proposal, in order to transfer the entangled state, we only need two identical two-level atoms and a two-mode cavity for receiving the teleported state. This scheme does not require Bell-state measurement and performing any transformations to reconstruct the initial state. And the transfer can occur with 100% success probability in a simple manner. And a network for transferring of a two-mode entangled state between cavities is suggested. This scheme can also be extended to transfer N-mode entangled state of cavity.

关键词： transfer cavity QED quantum entanglement resonant interaction

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Realization of Perfect Teleportation with W-States in Cavity QED

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Communications in Theoretical Physics 2008年第3期49卷 617-620页

作者： HE Juan YE Liu MA Chi LIU Qi ni zhi-xiang School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of Physics Fuyang Normal College Fuyang 230041 China

We put forward an experimentally feasible protocol for realizing a perfect teleportation by using a class of W-state in QED. The simple way of generating the entangled channel and distinguishing the measurement bases is the distinct feature of our scheme. In addition, the probability of teleportation is up to 100%. The scheme can be implemented by the present cavity QED techniques.

关键词： teleportation W state cavity QED

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