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The Thouless energy is a characteristic energy scale of diffusive disordered conductors. It is defined by , where D is the diffusion constant and L the size of the system, and thereby inversely proportional to the diffusion time through the system. It was first introduced by the Scottish-American physicist David J. Thouless when studying Anderson localization ,〔J. T. Edwards and D. J. Thouless, "Numerical studies of localization in disordered systems," ''J. Phys. C: Solid State Phys.'' 5, 807 (1972), () .〕 as a measure of the sensitivity of energy levels to a change in the boundary conditions of the system. Though being a classical quantity, it has been shown to play an important role in the quantum-mechanical treatment of disordered systems. 〔A. Altland, Y. Gefen, and G. Montambaux, "What is the Thouless Energy for Ballistic Systems?", ''Physical Review Letters'' 76, 1130 (1996), () .〕 ==References== 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「Thouless energy」の詳細全文を読む スポンサード リンク
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