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- W2017941394 abstract "Following previous work in which a variational method for the many-body problem was proposed wherein an effective potential $stackrel{ifmmode tilde{}else ~{}fi{}}{V}$ was introduced as a variational parameter to construct a trial wave function, we apply the method to the two-dimensional electron gas. In the method, every physical quantity is expanded in powers of $stackrel{ifmmode tilde{}else ~{}fi{}}{V}$ instead of the bare potential as in the usual perturbation-theoretic approach. Because of this choice of expansion parameter, the expansion series converges rapidly even in the strong-coupling region. The result for the correlation energy in the two-dimensional electron gas agrees very well with that given by the variational Monte Carlo method even in the lowest-order calculation (i.e., to second order in $stackrel{ifmmode tilde{}else ~{}fi{}}{V}$). The difference is within several percent for $1<{r}_{s}<100$." @default.
- W2017941394 created "2016-06-24" @default.
- W2017941394 creator A5089400643 @default.
- W2017941394 date "1984-10-01" @default.
- W2017941394 modified "2023-09-25" @default.
- W2017941394 title "Method of effective-potential expansion for the many-body problem: Two-dimensional electron gas in two-body approximation" @default.
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- W2017941394 doi "https://doi.org/10.1103/physrevb.30.3882" @default.
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