A discrete Hubbard-Stratonovich decomposition for general, fermionic two-body interactions
نویسنده
چکیده
A scheme is presented to decompose the exponential of a two-body operator in a discrete sum over exponentials of one-body operators. This discrete decomposition can be used instead of the Hubbard-Stratonovich transformation in auxiliary-field quantum Monte-Carlo methods. As an illustration, the decomposition is applied to the Hubbard model, where it is equivalent to the discrete Hubbard-Stratonovich transformation introduced by Hirsch, and to the nuclear pairing Hamiltonian. Typeset using REVTEX Postdoctoral Fellow of the Fund for Scientific Research Flanders (Belgium) 0
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