摘要
基于朗之万方程研究了一个运动在简谐势场中胶原粒子的热力学行为,给出了其在周期信号驱动下的有效温度和耗散功的解析表达式.结果表明:外部周期搅拌能够聚合环境热能传递给胶原粒子,使其有效温度大幅度增加,这是势场、外部信号及噪声的协作机理所引起;但是在共振条件下,外界所作的耗散功也达到极大.
For a colloidal particle in a harmonic potential driven by a periodic signal,we study its thermodynamic behavior and obtain the exact expressions of the effective temperature and dissipated work by solving the corresponding Langevin equation. The results show that due to the cooperative effect of the potential,the signal and the noise,the energy of the environment can be transferred to the colloidal particle through the stirring action of the periodic driving force,which makes the effective temperature of the system increase greatly. Under the condition of dynamical resonance,the dissipated work also reaches its maximum.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第3期1510-1516,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10674016)
教育部博士点基金(批准号:20050027001)资助的课题~~
关键词
耗散功
有效温度
周期信号
协作效应
dissipated work,effective temperature,periodic signal,cooperative effect
