| 阻尼振子的起伏频谱及扩散系数 |
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| 引用本文： | 党兰芬,康文秀. 阻尼振子的起伏频谱及扩散系数[J]. 河北大学学报(自然科学版), 1996, 0(3) |
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| 作者姓名： | 党兰芬 康文秀 |
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| 作者单位： | 华北电力大学 |
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| 摘 要： | 本文讨论一个最简单的耗散系统，即一个谐振子与热库耦合的系统。给出Ｌａｎｇｅｖｉｎ力Ｇ（ｔ）及算符ａ（ｔ），ａ￣＋（ｔ）的定义，由此算出阻尼振子的起伏频谱及扩散系数。其结果与Ｗｉｇｎｅｒ－ｗｅｉｓｓｋｏｐｆ近似下求得结果完全一致。
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| 关 键 词： | 阻尼振子，热库，耗散系统，起伏谱，扩散系数 |
Fluctuation Frequency Spectrum and Diffusion Coefficient of Damped Oscillators |
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| Dang Lanfen,Kang Wenxu. Fluctuation Frequency Spectrum and Diffusion Coefficient of Damped Oscillators[J]. Journal of Hebei University (Natural Science Edition), 1996, 0(3) |
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| Authors: | Dang Lanfen Kang Wenxu |
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| Abstract: | In this paper,we discuss the simplest dissipative system,a harmonic oscillator coupled to enverwment,Which is a bath of harmonic oscillators.We define the Langevin force G(t)and operators a(t) a￣+(t).We calculate the fluctuated frequency spectrum and diffusion coefficient,the result is in agreement with the one's obtained by Weigner Weisskopf approximation. |
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| Keywords: | Damped oscillators Bath Dissipative system Fluctuated frequency spectrum Diffusion coeffecient |
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