arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1410.4367quant-ph
收藏

量子刘维尔方程是非刘维尔方程

The Quantum Liouville Equation is non-Liouvillian

Dimitris Kakofengitis, Ole Steuernagel

摘要:

一个经典的、与时间无关的、保守系统的哈密顿流是不可压缩的,它是刘维尔流。量子力学系统的哈密顿运动方程的类似物是量子刘维尔方程。它表明,其相空间中的量子流,维格纳流,不是不可压缩的。它产生了经典哈密顿向量场的量子模拟:Wigner相空间速度场$\bm w$,它的发散可以是无界的。这种无界发散的轨迹在相空间中形成与维格纳函数的零点线重合的线。沿着这条线存在着与维格纳流的驻点相一致的特征夹点。

英文摘要:

The Hamiltonian flow of a classical, time-independent, conservative system is incompressible, it is Liouvillian. The analog of Hamilton's equations of motion for a quantum-mechanical system is the quantum-Liouville equation. It is shown that its associated quantum flow in phase space, Wigner flow, is not incompressible. It gives rise to a quantum analog of classical Hamiltonian vector fields: the Wigner phase space velocity field~$\bm w$, the divergence of which can be unbounded. The loci of such unbounded divergence form lines in phase space which coincide with the lines of zero of the Wigner function. Along these lines exist characteristic pinch points which coincide with stagnation points of the Wigner flow.

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。

↑