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- W1976972649 abstract "A nonperturbative theory of the electron propagator is developed and used to calculate the one-particle Green's function and tunneling density-of-states in strongly correlated electron systems. The method, which is based on a Hubbard-Stratonovich decoupling of the electron-electron interaction combined with a cumulant expansion of the resulting noninteracting propagator, provides a possible generalization of the instanton technique to the calculation of the electron propagator in a many-body system. Application to the one-dimensional electron gas with short-range interaction is discussed." @default.
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- W1976972649 date "2002-01-01" @default.
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- W1976972649 title "Instanton method for the electron propagator" @default.
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- W1976972649 doi "https://doi.org/10.1016/s1386-9477(01)00248-x" @default.
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