We propose a quantum nondemolition measurement of the photon-number distribution for a two-mode cavity field. In the scheme two sequences of two-level atoms interact dispersively with the respective cavity modes and resonantly with two classical fields, and then are detected continually. The field finally reduces to a two-mode Fock state. The probability of collapsing to a given Fock state is determined by the initial photon-number distribution. The scheme can be easily generalized to a field with N modes.
Abstract
We propose a quantum nondemolition measurement of the photon-number distribution for a two-mode cavity field. In the scheme two sequences of two-level atoms interact dispersively with the respective cavity modes and resonantly with two classical fields, and then are detected continually. The field finally reduces to a two-mode Fock state. The probability of collapsing to a given Fock state is determined by the initial photon-number distribution. The scheme can be easily generalized to a field with N modes.
关键词
quantum nondemolition measurement /
photon-number distribution /
twomode field
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Key words
quantum nondemolition measurement /
photon-number distribution /
twomode field
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中图分类号：
42.50.Dv
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参考文献
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脚注
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基金
The project supported by Science Research Foundation of Education Committee of Fujian Province and Funds from Fuzhou University
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