Kinetic theory for transverse optomechanical instabilities.
Kinetic theory for transverse optomechanical instabilities.
复制标题
横向光机械不稳定性的动力学理论。
作者：
E. Tesio;G. Robb;Thorsten Ackemann;W. J. Firth;G. Oppo
本文研究了无碰撞、无阻尼的冷二能级原子气体中光与平移自由度之间的光机械耦合引起的横向不稳定性。我们开发了一个动力学理论，也可以映射到下有质动力的电子等离子体的情况下。横向不稳定性的存在和空间尺度的一般标准确定，特别是，我们证明，单调递减的速度分布函数总是不稳定的。
We investigate transverse symmetry-breaking instabilities emerging from the optomechanical coupling between light and the translational degrees of freedom of a collisionless, damping-free gas of cold, two-level atoms. We develop a kinetic theory that can also be mapped on to the case of an electron plasma under ponderomotive forces. A general criterion for the existence and spatial scale of transverse instabilities is identified; in particular, we demonstrate that monotonically decreasing velocity distribution functions are always unstable.