Fluctuation sound absorption in quark matter

TL;DR

This paper explores how sound waves are absorbed in quark matter near the phase transition, highlighting the role of fluctuations and collective modes using a Ginzburg-Landau approach.

Contribution

It introduces a theoretical framework for understanding sound absorption in quark matter through the dynamics of diquark-pair fluctuations above T_c.

Findings

Strong sound absorption occurs near the phase transition line.

The soft collective mode of the pair field is characterized using a time-dependent Ginzburg-Landau functional.

Absorption behavior aligns with the Mandelshtam-Leontovich slow relaxation theory.

Abstract

We investigate the sound absorption in quark matter due to the interaction of the sound wave with the precritical fluctuations of the diquark-pair field above $T_c$. The soft collective mode of the pair field is derived using the time dependent Ginzburg-Landau functional with random Langevin forces. The strong absorption near the phase transition line may be viewed as a manifestation of the Mandelshtam-Leontovich slow relaxation time theory.