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Thermodynamics from Monte Carlo Hamiltonian | | L.A. Caron
; H. Kröger
; G. Melkonyan
; X.Q. Luo
; K.J.M. Moriarty
; | | Date: |
11 Feb 2002 | | Journal: | Quantum Monte Carlo: Recent Advances and Common Problems in Condensed Matter and Field Theory, eds. M. Campostrini, M.P. Lombardo, F. Pederiva, Edizioni ETS, Pisa (2001), p.94 | | Subject: | hep-lat | | Abstract: | We construct an effective low-energy Hamiltonian from the classical action via Monte Carlo with importance sampling. We use Monte Carlo (i) to compute matrix elements of the transition amplitude and (ii) to construct stochastically a basis. The MC Hamiltonian allows to obtain energies and wave functions of low-lying states. It allows also to compute thermodynamical observables in some temperature window (starting from temperature zero). We present examples from lattice field theory (Klein-Gordon model). | | Source: | arXiv, hep-lat/0202016 | | Services: | Forum | Review | PDF | Favorites | |
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