Thermal Mass and Plasmino for Strongly Interacting Fermions

TL;DR

This paper explores the behavior of strongly interacting fermions at finite temperature and density using holographic models, revealing the universal absence of thermal mass and plasmino modes, and linking these features to the dual Rashiba effect.

Contribution

It demonstrates that vanishing thermal mass and the lack of plasmino modes are universal in strongly coupled fermion systems, connecting these phenomena to holographic duality and the Rashiba effect.

Findings

Thermal mass vanishes in strongly coupled fermion systems.

Plasmino modes do not exist at finite temperature in these systems.

The dual Rashiba effect explains the presence of density-induced plasmino modes.

Abstract

We investigate fermion self energy problem in the strongly coupled dense medium in holographic approach. By working out bottom up models as well as top down ones we showed that vanishing thermal mass and non-existence of temperature generated plasmino mode is the universal feature of the strongly interacting fermion system. We identified that the dual of the bulk Rashiba effect, which was recently found by the Herzog et.al, is the presence of the plasmino mode generated by the density.