磁场作用下外力驱动的非平衡态
Non-equilibrium driven by an external torque in the presence of a magnetic field
摘要：
本文研究了在均匀磁场中，由一个产生力矩的非保守力驱动的谐振势阱中胶体的运动。我们发现，稳态只存在于一个适当的范围内的参数，如质量，粘性系数，刚度的谐波势，和磁场，这是没有观察到的过阻尼极限。我们得到了平衡态的存在条件。我们研究了非保守力和磁场对非平衡态的影响，如非玻尔兹曼稳态概率分布函数、概率流、熵产生、位置-速度相关以及涨落-耗散关系的破坏.
英文摘要：
We investigate a motion of a colloid in a harmonic trap driven out of equilibrium by an external non-conservative force producing a torque in the presence of a uniform magnetic field. We find that steady state exists only for a proper range of parameters such as mass, viscosity coefficient, and stiffness of the harmonic potential, and the magnetic field, which is not observed in the overdamped limit. We derive the existence condition for the steady state. We examine the combined influence of the non-conservative force and the magnetic field on non-equilibrium characteristics such as non-Boltzmann steady-state probability distribution function, probability currents, entropy production, position-velocity correlation, and violation of fluctuation-dissipation relation.
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