论文标题
通过刺激过程的新型玻色颗粒的凝结
New kind of condensation of Bose particles through stimulated processes
论文作者
论文摘要
我们表明，具有最初宽的能量分布的n个bose颗粒的孤立系统的刺激散射可以使颗粒的凝结成激发的集体状态，其中大多数玻色子占据了一种或几种模式。在凝结过程中，总颗粒数和能量是保守的，而系统的熵会增长。当由于扩散而宽广的频谱扩大时，当频谱狭窄时，凝结的发作发生在临界粒子占用数量下。这不同于玻色的凝结，其中颗粒由于热过程而经历凝结到平衡状态。
We show that stimulated scattering of an isolated system of N Bose particles with initially broad energy distribution can yield condensation of particles into excited collective state in which most of the bosons occupy one or several modes. During condensation, the total particle number and energy are conserved, while entropy of the system grows. Onset of condensation occurs at a critical particle occupation number when spectrum narrowing due to stimulated processes overcomes spectrum broadening due to diffusion. This differs from Bose-Einstein condensation in which particles undergo condensation into the equilibrium state due to thermalization processes.
