Collective charge excitations and the metal-insulator transition in the square lattice Hubbard-Coulomb model

URN to cite this document:: urn:nbn:de:bvb:355-epub-395800
DOI to cite this document:: 10.5283/epub.39580

Ulybyshev, Maksim

; Winterowd, Christopher ; Zafeiropoulos, Savvas

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Date of publication of this fulltext: 20 Mar 2019 13:10

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Abstract

In this article, we discuss the nontrivial collective charge excitations (plasmons) of the extended square lattice Hubbard model. Using a fully nonperturbative approach, we employ the hybrid Monte Carlo algorithm to simulate the system at half-filling. A modified Backus-Gilbert method is introduced to obtain the spectral functions via numerical analytic continuation. We directly compute the ...