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Simplified Scheme for Test of Quantum Nonlocality Without Using Bell Inequality

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Communications in Theoretical Physics 2001年第11期36卷 547-549页

作者： zheng shi-biao Department of Electronic Science and Applied Physics Fuzhou UniversityFuzhou 350002China

A simplified scheme is proposed for the test of quantum nonlocality of the type described by Hardy [***.71 (1993) 1665].In the scheme two appropriately prepared atoms are simultaneously sent through a cavity and dispersively interact with the cavity *** state-selective measurements are performed on these atoms,which may reveal quantum nonlocality without using Bell *** also propose a simple scheme for the generation of multi-atom entangled states.

关键词： quantum nonlocality,Bell inequality,entangled state

High-Speed Generation of Entangled States for Two Three-Level Atoms

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Communications in Theoretical Physics 2007年第3期47卷 555-556页

作者： zheng shi-biao Department of Electronic Science and Applied Physics Fuzhou University Fuzhou 350002 China

A scheme is presented for generating entangled states for two three-level atoms in a cavity. In the scheme two atoms simultaneously interact with a cavity mode with a small detuning. Thus, the operation time is very ... 详细信息

关键词： entangled state three-level atom cavity

Quantum Phase Gates for Trapped Ions via Adiabatic Passage

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Communications in Theoretical Physics 2007年第4X期48卷 626-628页

作者： zheng shi-biao Department of Electronic Science and Applied Physics Fuzhou University Fuzhou 350002 China

We propose a scheme to produce quantum phase gates for trapped ions. Taking advantage of the adiabatic evolution, the operation is insensitive to small fluctuations of experimental parameters. Furthermore, the spontaneous emission is suppressed since the ions have no probability of being populated in the electronic excited states.

关键词： quantum phase gate trapped ion adiabatic passage

Generation of Superpositions of Two-Mode Coherent States for the Motion of Two Trapped Ions

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Communications in Theoretical Physics 2005年第6X期44卷 1071-1072页

作者： zheng shi-biao Department of Electronic Science and Applied Physics Fuzhou University Fuzhou 350002 China

We propose a method for the generation of superpositions of two-mode coherent states for the center-of-mass and relative vibrational modes of two trapped ions. In the scheme the ions are driven by a single travelling-wave laser field tuned to the carrier. Then a measurement of the internal states collapses the vibrational modes to the entangled coherent state.

关键词： superposition of two-mode coherent states trapped ion vibrational mode

A Photon Switch Based on the Quantum Nonlocality

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Chinese Physics Letters 1996年第12期13卷 906-908页

作者： GUO Guang-can zheng shi-biao Department of Physics and Nonlinear Science Center University of Science and Technology of ChinaHefei 230026

We present a scheme to realize a photon switch for controlling the state of the field in a cavity between a coherent state and a Schrödinger cat *** the scheme,an atom crosses two cavities *** atom is resonant with the first cavity mode,and off-resonant with the second cavity *** detection of the atomic state leaves the two cavity modes in an entangled *** can determine whether the second cavity field is in a coherent state or in a Schrödinger cat state via the detection of the photon in the first cavity.

关键词： state resonant coherent

Efficient Scheme for Entangling Two Distant Atoms

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Communications in Theoretical Physics 2008年第2期49卷 351-354页

作者： LU Dao-Ming zheng shi-biao Department of Electronic Engineering Nanping Teachers College Wuyishan 354300 China Department of Electronic Science and Applied Physics Fuzhou University Fuzhou 350002 China

A scheme is presented for the generation of entangled states for two atoms trapped in two distant cavities. In the scheme each atom is resonantly coupled with the respective cavity mode and driven by a strong classical field. The detection of a photon decaying from the cavities and passing through a beam-splitter collapses the atoms to an entangled state. The required atom-field interaction time is very short and thus the decoherence effect is suppressed. Our scheme is within the reach of presently available cavity QED techniques.

关键词： entangled state cavity QED beam splitter

Entanglement and Phase-Covariant Cloning for Multiple Trapped Ions via Adiabatic Passage

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Communications in Theoretical Physics 2008年第3期49卷 649-651页

We describe a scheme for the generation of W states and implementation of phase-covariant cloning for n trapped ions. The scheme does not use the vibational mode as the memory and works beyond the Lamb-Dicke regime. T... 详细信息

关键词： entanglement trapped ion adiabatic passage

Generation of Superpositions of Squeezed Coherent States

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Chinese Physics Letters 1997年第4期14卷 273-276页

作者： zheng shi-biao GUO Guang-can Department of Physics and Nonlinear Science Center University of Science and Technology of ChinaHefei 230026

A scheme to prepare superpositions of squeezed coherent states is *** involves an appropriately prepared atom crossing a high-Q cavity initially filled with a squeezed coherent *** the nonresonant interaction with the cavity field the detection of the atomic state leaves the cavity field in a superposition of two squeezed coherent states.

关键词： field. states. coherent

Proposal for Direct Measurement of the Wigner Function of a Cavity Field via Raman Coupling

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Chinese Physics Letters 2000年第12期17卷 882-884页

作者： zheng shi-biao ZHU Xi-Wen Department of Electronic Science and Applied Physics Fuzhou UniversityFuzhou 350002 Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071

We propose a scheme for the reconstruction of a cavity field *** the scheme the cavity field is first displaced by a microwave source,and then couples with a three-level A-type atom in a Raman *** an appropriate interaction time the measurement of the difference between the probabilities of the atom being in two ground states directly yields the Wigner function for the field *** scheme can be easily generalized to measure the Wigner function of an entangled state of two spatially separated single-mode cavities.

关键词： state. scheme Wigner