Negative Resistance in a Two-Dimensional System with Entropic Barrier
ZHANG Xiao-Peng, BAO Jing-Dong
Department of Physics, Beijing Normal University, Beijing 100875
Negative Resistance in a Two-Dimensional System with Entropic Barrier
ZHANG Xiao-Peng;BAO Jing-Dong
Department of Physics, Beijing Normal University, Beijing 100875
关键词 ：
05.40.-a ,
02.50.-r ,
05.20.-y
Abstract ： A phenomenon of negative resistance is found in two-dimensional bistable and periodic potentials via Langevin simulation, where output quantities for noise and signal driven system, such as the power-spectrum density modulus and the signal power amplification, can become minima at finite temperatures. In such a system, the curvature of the potential along non-transport degree of freedom at the barrier is larger than that at the local minima. The temperature-dependent effective barrier, i.e. entropic barrier, is introduced via integration over the non-transport variables. The system shows the negative resistance because of the competence between the signal and the entropic barrier.
Key words ：
05.40.-a
02.50.-r
05.20.-y
出版日期: 2005-02-01
:
05.40.-a
(Fluctuation phenomena, random processes, noise, and Brownian motion)
02.50.-r
(Probability theory, stochastic processes, and statistics)
05.20.-y
(Classical statistical mechanics)
引用本文:
ZHANG Xiao-Peng;BAO Jing-Dong. Negative Resistance in a Two-Dimensional System with Entropic Barrier[J]. 中国物理快报, 2005, 22(2): 283-286.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2005/V22/I2/283
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2005, Vol. 22 
