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arXiv 1306.3782math-phcond-mat.stat-mechmath.MPnlin.SI
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二维相空间中的可积量子流体力学

Integrable Quantum Hydrodynamics in Two Dimensional Phase Space

Eldad Bettelheim

摘要:

二维量子液体代表了有趣的量子动力学系统,原因有几个,其中包括存在无限隐藏对称的可能性,例如保形对称或与面积保持对称性相关的对称性。我们知道,当对称代数足够大时,对称性可以完全规定动力学。然而,这在二维流体力学中的证明方式,无论是经典的还是量子的,都没有完全理解。在这里,我们采取一个步骤,澄清这个问题,通过集中在一个特定的例子,即二维相空间液体出现时,考虑Calogero模型,一个多体一维系统通过平方反比定律潜在的相互作用。我们演示了如何对称代数的守恒量的一维系统表示在不可压缩的欧拉流体力学的点涡在相空间。由于量子流体力学和经典随机流体力学之间的形式关系,这是固有的随机量子化的方法,这里开发的思想和方法也可能有应用在随机经典流体力学的研究,经过适当的修改。

英文摘要:

Quantum liquids in two dimensions represent interesting dynamical quantum systems for several reasons, among them the possibility of the existence of infinite hidden symmetries, such as conformal symmetry or the symmetry associated with area preserving diffeo-morphisms. It is known that when the symmetry algebra is large enough, symmetry may fully prescribe the dynamics. However, the way this is borne out in two dimensional hydrodynamics, both classical and quantum, is not fully understood. Here we take a step in clarifying this issue, by focusing on a particular example, namely that of a two dimensional phase space liquid which emerges when one considers the Calogero model, a many-body one-dimensional system interacting through an inverse square law potential. We demonstrate how the symmetry algebra of conserved quantities of the one dimensional system is expressed in terms of the incompressible Euler hydrodynamics of point vortices in phase space. Due to a formal relation between quantum hydrodynamics and classical stochastic hydrodynamics, which is inherent in the method of stochastic quantization, the ideas and methods developed here may also have application in the study of stochastic classical hydrodynamics, after suitable modifications.

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