Rearrangements of interacting Fermi liquids

TL;DR

This paper investigates how strong interactions can destabilize Fermi liquids, leading to a reconstructed ground state, with implications for systems like vector boson exchange and relativistic heavy-ion collisions.

Contribution

It demonstrates that relatively weak interactions can cause ground-state rearrangements in Fermi liquids under certain conditions, expanding understanding of their stability.

Findings

Weak vector boson interactions can cause rearrangement with large fermion mass.

Relativistic heavy-ion collisions may also induce ground-state changes.

Rearrangements affect the statistical properties of collision systems.

Abstract

The stability condition of Landau Fermi liquid theory may be broken when the interaction between particles is strong enough. In this case, the ground state is reconstructed to have a particle distribution different from the Fermi-step function. For specific instances, one case with the vector boson exchange and another with the relativistic heavy-ion collision are taken into consideration. With the vector boson exchange, we find that the relative weak interaction strength can lead to the ground-state rearrangement as long as the fermion mass is large enough. It is found that the relativistic heavy-ion collision may also cause the ground-state rearrangement, affecting the statistics of the collision system.