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arXiv 0811.1877quant-ph
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随机Schroedinger演化的长时间行为

On the long time behavior of stochastic Schroedinger evolutions

Angelo Bassi, Detlef Duerr, Martin Kolb

摘要:

我们讨论了随机薛定谔方程的波函数的时间演化,该方程描述了自由量子粒子在空间中自发局域化的动力学。我们证明了整体解的存在性和唯一性。观察到存在三个时间制度,即崩溃制度,之后的波函数是本地化的空间,经典制度,在此期间,崩溃的波函数沿经典路径和扩散制度,其中扩散重叠显着的确定性运动,我们研究的长时间行为的波函数。我们断言通解a.s.收敛。扩散高斯波函数在位置和动量上都具有有限的扩展。本文对前人的工作进行了修正和补充。

英文摘要:

We discuss the time evolution of the wave function which is solution of a stochastic Schroedinger equation describing the dynamics of a free quantum particle subject to spontaneous localizations in space. We prove global existence and uniqueness of solutions. Observing that there exist three time regimes, namely the collapse regime, after which the wave function is localized in space; the classical regime, during which the collapsed wave function moves along a classical path and the diffusive regime, in which diffusion overlaps significantly the deterministic motion, we study the long time behavior of the wave function. We assert that the general solution converges a.s. to a diffusing Gaussian wave function having a finite spread both in position as well as in momentum. This paper corrects and completes earlier works on this.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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