Document Type

Article

Publication Date

1-1-1993

Publication Title

Physical Review E

Volume

47

First Page

739

Last Page

742

DOI

10.1103/PhysRevE.47.739

Keywords

quantam, turbulence

Disciplines

Other Astrophysics and Astronomy | Other Physics

Abstract

The nonlinear quantum kinetic equation for the interaction of sound waves is solved via analytic and numerical techniques. In the classical regime energy cascades to higher frequency (ω) according to the steady-state power law ω-3/2. In the quantum limit, the system prefers a reverse cascade of energy which follows the power law ω-6. Above a critical flux, a new type of spectrum appears which is neither self-similar nor close to equilibrium. This state of nonlinear quantum wave turbulence represents a flow of energy directly from the classical source to the quantum degrees of freedom.

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