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- W2014501079 abstract "The ground state of a many-electron system can be projected from a trial state using an integral of one-electron projectors over a set of Hubbard-Stratonovich auxiliary fields. We have explored several alternative formulations of this method and find that the convergence of the ground-state energy with the number of field variables can be dramatically improved by choosing the appropriate one. This is illustrated using the two-dimensional Hubbard model as an example. These results are also used to examine the error associated with neglecting the so-called ``sign problem'' common to quantum Monte Carlo many-fermion calculations." @default.
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- W2014501079 date "1990-06-01" @default.
- W2014501079 modified "2023-09-25" @default.
- W2014501079 title "Energy measurement in auxiliary-field many-electron calculations" @default.
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- W2014501079 doi "https://doi.org/10.1103/physrevb.41.11352" @default.
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