Decay of Correlations in Fermi Systems at Non-zero Temperature

Details Decay of Correlations in Fermi Systems at Non-zero Temperature Decay of Correlations in Fermi Systems at Non-zero Temperature

2004-06-16

arxiv.org/abs/cond-mat/0406348v1

Phys. Rev. Lett. 93, 126402 (2004).

Physics

Condensed Matter

Materials Science

3 pages, 0 figures

Scientific paper

10.1103/PhysRevLett.93.126402

The locality of correlation functions is considered for Fermi systems at non-zero temperature. We show that for all short-range, lattice Hamiltonians, the correlation function of any two fermionic operators decays exponentially with a correlation length which is of order the inverse temperature for small temperature. We discuss applications to numerical simulation of quantum systems at non-zero temperature.

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