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- W1985332019 endingPage "9687" @default.
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- W1985332019 abstract "The Holstein model of spinless fermions interacting with dispersionless phonons in one dimension is studied by a Green's function Monte Carlo technique. The ground state energy, first fermionic excited state, density wave correlations, and mean lattice displacement are calculated for lattices of up to 16 sites, for one fermion per two sites, i.e., a half-filled band. Results are obtained for values of the fermion hopping parameter of $t=0.1 omega$, $omega$, and $10 omega$ where $omega$ is the phonon frequency. At a finite fermion-phonon coupling $g$ there is a transition from a metallic phase to an insulating phase in which there is charge-density-wave order. Finite size scaling is found to hold in the metallic phase and is used to extract the coupling dependence of the Luttinger liquid parameters, $u_rho$ and $K_rho$, the velocity of charge excitations and the correlation exponent, respectively. For free fermions ($g=0$) and for strong coupling ($g^2 gg t omega$) our results agree well with known analytic results. For $t=omega$ and $t=10omega$ our results are inconsistent with the metal-insulator transition being a Kosterlitz-Thouless transition." @default.
- W1985332019 created "2016-06-24" @default.
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- W1985332019 date "1996-04-15" @default.
- W1985332019 modified "2023-10-09" @default.
- W1985332019 title "Quantum Monte Carlo study of the one-dimensional Holstein model of spinless fermions" @default.
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- W1985332019 doi "https://doi.org/10.1103/physrevb.53.9676" @default.
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