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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Mandel Q parameter ： ウィキペディア英語版 Mandel Q parameter The Mandel Q parameter measures the departure of the occupation number distribution from Poissonian statistics. It was introduced in quantum optics by L. Mandel.〔Mandel, L., Sub-Poissonian photon statistics in resonance fluorescence, ''Opt. Lett.'' 4:205 (1979)〕 It is a convenient way to characterize non-classical states with negative values indicating a sub-Poissonian statistics, which have no classical analog. It is defined as the normalized variance of the boson distribution: :$Q=\backslash frac\; \backslash rangle\}\; =\; \backslash frac\; \backslash rangle^2\}\; -1\; =\; \backslash langle\; \backslash hat\; \backslash rangle\; \backslash left(g^(0)-1\; \backslash right)$ where $\backslash hat$ is the photon number operator and $g^$ is the normalized second-order correlation function as defined by Glauber.〔Glauber, R. J., The Quantum Theory of Optical Coherence, ''Phys. Rev.'' 130:2529 (1963)〕 ==Non-classical value== Negative values of Q corresponds to state which variance of photon number is less than the mean (equivalent to sub-Poissonian statistics). In this case, the phase space distribution cannot be interpreted as a classical probability distribution. : The minimal value $Q=-1$ is obtained for photon number states, which by definition have a well-defined number of photon and for which $\backslash Delta\; n=0$. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mandel Q parameter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.