Calogero-Sutherland模型的可积流体力学：双向Benjamin-Ono方程
Integrable hydrodynamics of Calogero-Sutherland model: Bidirectional Benjamin-Ono equation
摘要：
我们开发了一个经典的Calogero-Sutherland液体的流体动力学描述：一个Calogero-Sutherland模型与无限数量的粒子和非零密度的粒子。流体动力学方程，被写的液体的密度和速度场，示出是一个双向模拟的Benjamin-Ono方程。后者是已知的描述内部波的深层分层流体。我们表明，双向Benjamin-Ono方程出现作为一个真正的减少修改后的KP层次。我们导出了作为双向方程的手征约化的手征非线性方程。传统的Benjamin-Ono方程是手征非线性方程在大密度下的退化。我们构造了双向Benjamin-Ono方程和手征非线性方程的多相解。
英文摘要：
We develop a hydrodynamic description of the classical Calogero-Sutherland liquid: a Calogero-Sutherland model with an infinite number of particles and a non-vanishing density of particles. The hydrodynamic equations, being written for the density and velocity fields of the liquid, are shown to be a bidirectional analogue of Benjamin-Ono equation. The latter is known to describe internal waves of deep stratified fluids. We show that the bidirectional Benjamin-Ono equation appears as a real reduction of the modified KP hierarchy. We derive the Chiral Non-linear Equation which appears as a chiral reduction of the bidirectional equation. The conventional Benjamin-Ono equation is a degeneration of the Chiral Non-Linear Equation at large density. We construct multi-phase solutions of the bidirectional Benjamin-Ono equations and of the Chiral Non-Linear equations.
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