Energy fluctuations in a biharmonically driven nonlinear system

Pramana

A M Jayannavar¹  Navinder Singh¹  Sourabh Lahiri1¹ 

[1] Institute of Physics, Sachivalaya Marg, Bhubaneswar 751 005, India$$

关键词: Stochastic resonance;    fluctuation theorem.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We study the fluctuations of work done and dissipated heat of a Brownian particle in a symmetric double well system. The system is driven by two periodic input signals that rock the potential simultaneously. Confinement in one preferred well can be achieved by modulating the relative phase between the drives. We show that in the presence of pumping the stochastic resonance signal is enhanced when analysed in terms of the average work done on the system per cycle. This is in contrast with the case when pumping is achieved by applying an external static bias, which degrades resonance. We analyse the nature of work and heat fluctuations and show that the steady state fluctuation theorem holds in this system.

【 授权许可】

Unknown