February 2013, Volume 14, Issue 1, pp 1-36,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 29 May 2012
On the Energy-Momentum Spectrum of a Homogeneous Fermi Gas
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.
Communicated by Claude Alain Pillet.
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- On the Energy-Momentum Spectrum of a Homogeneous Fermi Gas
- Open Access
- Available under Open Access This content is freely available online to anyone, anywhere at any time.
Annales Henri Poincaré
Volume 14, Issue 1 , pp 1-36
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- 1. Department of Mathematical Methods in Physics, Faculty of Physics, University of Warsaw, Hoża 74, 00-682, Warsaw, Poland
- 2. Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland