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

Chin. Phys. Lett.

2000, Vol. 17

Issue (12): 882-884 DOI:

Original Articles

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

ZHENG Shi-Biao^1,2;ZHU Xi-Wen²

¹Department of Electronic Science and Applied Physics, Fuzhou University, Fuzhou 350002 ²Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071

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ZHENG Shi-Biao, ZHU Xi-Wen 2000 Chin. Phys. Lett. 17 882-884

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Abstract We propose a scheme for the reconstruction of a cavity field state. In 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 manner. After 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 state. The scheme can be easily generalized to measure the Wigner function of an entangled state of two spatially separated single-mode cavities.

Keywords: 42.50.Dv 03.65.Bz

Published: 01 December 2000

PACS:	42.50.Dv	(Quantum state engineering and measurements)
	03.65.Bz

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2000/V17/I12/0882

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	ZHU Xi-Wen

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