Massless fermions in a bag at finite density and temperature

Abstract

We introduce the chemical potential in a system of massless fermions in a bag by impossing boundary conditions in the Euclidean time direction. We express the fermionic mean number in terms of a functional trace involving the Green's function of the boundary value problem, which we study analytically. Numerical evaluations are made, and an application to a simple hadron model is discussed.

14 pages, 3 figures, RevTeX

References in corpus (5)

• Cheshire Cat Hadrons
• Electromagnetic pion form factor at finite temperature
• Cheshire Cat Scenario in a 3+1 dimensional Hybrid Chiral Bag
• Confined two-dimensional fermions at finite density
• Determinants of Dirac operators with local boundary conditions

Cited by in corpus (7)

• Casimir energy in the MIT bag model
• Casimir Energies for Spherically Symmetric Cavities
• Thermal nonlocal Nambu--Jona-Lasinio model in the real time formalism
• Unstable quasiparticles as a source of thermodynamic instabilities in the thermal nonlocal Nambu-Jona-Lasinio model
• Topological Field Configurations in the Presence of Isospin Chemical Potential
• Finite density and temperature in hybrid bag models
• Gauge dependence ambiguity and chemical potential in thermal U(1) theory