Preparation of W State with Superconducting Quantum-Interference Devices in a Cavity via Adiabatic Passage

ZHENG An-Shou; SHEN Xiao-Fang; LIU Ji-Bing; BI Jie; DU Qiu-Jiao

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Preparation of W State with Superconducting Quantum-Interference Devices in a Cavity via Adiabatic Passage

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@@ We propose an alternative scheme to prepare W state by using superconducting quantum-interference devices (SQUIDs) coupled to a largely-detuned cavity. The present scheme is based on evolution by adiabatic passage,where only by tuning adiabatically the Rabi frequencies of the classical microwave pulses we can obtain the standard W state without measurement or any auxiliary SQUIDs. Thus the procedure is simplified and the scheme can be achieved with very high success probability since the errors in dynamical or geometric ways can be avoided. In addition, the SQUID system and the cavity have no probability of being excited state. Thus decoherence caused by the excited-level spontaneous emission or the cavity decay is suppressed.

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《中国物理快报：英文版》 |2008年第4期|1195-1197|共3页
作者
ZHENG An-Shou; SHEN Xiao-Fang; LIU Ji-Bing; BI Jie; DU Qiu-Jiao;
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College of Mathematics and Physics, China University of Geosciences, Wuhan 430074;

Department of Mathematics, Huazhong University of Science and Technology, Wuchang 430064;

Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;

College of Mathematics and Physics, China University of Geosciences, Wuhan 430074;

Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;

College of Mathematics and Physics, China University of Geosciences, Wuhan 430074;

Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;

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中图分类物理学;
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Preparation of W State with Superconducting Quantum-Interference Devices in a Cavity via Adiabatic Passage

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