info:eu-repo/semantics/article
Mean-field phase diagram of the extended Bose-Hubbard model of many-body cavity quantum electrodynamics
Fecha
2019-04-30Registro en:
Himbert, Lukas; Cormick, Maria Cecilia; Kraus, Rebecca; Sharma, Shraddha; Morigi, Giovanna; Mean-field phase diagram of the extended Bose-Hubbard model of many-body cavity quantum electrodynamics; American Physical Society; Physical Review A; 99; 4; 30-4-2019; 043633
2469-9926
2469-9934
CONICET Digital
CONICET
Autor
Himbert, Lukas
Cormick, Maria Cecilia
Kraus, Rebecca
Sharma, Shraddha
Morigi, Giovanna
Resumen
We investigate the mean-field phase diagram of the Bose-Hubbard model with infinite-range interactions in two dimensions. This model describes ultracold bosonic atoms confined by a twodimensional optical lattice and dispersively coupled to a cavity mode with the same wavelength as the lattice. We determine the ground-state phase diagram for a grand-canonical ensemble by means of analytical and numerical methods. Our results mostly agree with the ones reported in Dogra et al. [PRA 94, 023632 (2016)], and have a remarkable qualitative agreement with the quantum Monte Carlo phase diagrams of Flottat et al. [PRB 95, 144501 (2017)]. The salient differences concern the stability of the supersolid phases, which we discuss in detail. Finally, we discuss differences and analogies between the ground state properties of strong long-range interacting bosons with the ones predicted for repulsively interacting dipolar bosons in two dimensions.