Annales Henri Poincaré

, Volume 14, Issue 1, pp 1–36

On the Energy-Momentum Spectrum of a Homogeneous Fermi Gas

  • Jan Dereziński
  • Krzysztof A. Meissner
  • Marcin Napiórkowski
Open AccessArticle

DOI: 10.1007/s00023-012-0185-9

Cite this article as:
Dereziński, J., Meissner, K.A. & Napiórkowski, M. Ann. Henri Poincaré (2013) 14: 1. doi:10.1007/s00023-012-0185-9

Abstract

We consider translation-invariant quantum systems in thermodynamic limit. We argue that their energy-momentum spectra should have shapes consistent with effective models involving quasiparticles. Our main example is second quantized homogeneous interacting Fermi gas in a large cubic box with periodic boundary conditions, at zero temperature. We expect that its energy-momentum spectrum has a positive energy gap and a positive critical velocity.

Download to read the full article text

Copyright information

© The Author(s) 2012

Authors and Affiliations

  • Jan Dereziński
    • 1
  • Krzysztof A. Meissner
    • 2
  • Marcin Napiórkowski
    • 1
  1. 1.Department of Mathematical Methods in Physics, Faculty of PhysicsUniversity of WarsawWarsawPoland
  2. 2.Institute of Theoretical Physics, Faculty of PhysicsUniversity of WarsawWarsawPoland