a Correlation Estimate for Quantum Many-Body Systems at Positive Temperature

@article{Seiringer2006aCE,
  title={a Correlation Estimate for Quantum Many-Body Systems at Positive Temperature},
  author={R. Seiringer},
  journal={Reviews in Mathematical Physics},
  year={2006},
  volume={18},
  pages={233-253}
}
  • R. Seiringer
  • Published 2006
  • Physics, Mathematics
  • Reviews in Mathematical Physics
  • We present an inequality that gives a lower bound on the expectation value of certain two-body interaction potentials in a general state on Fock space in terms of the corresponding expectation value for thermal equilibrium states of non-interacting systems and the difference in the free energy. This bound can be viewed as a rigorous version of first-order perturbation theory for many-body systems at positive temperature. As an application, we give a proof of the first two terms in a high… CONTINUE READING
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