Results 11 to 20 of about 6,166 (163)
Results in Physics, 2023 At non-half-filling, a one-dimensional interacting electronic model (t–U–R) is studied analytically. The particular correlated hopping keeps particle–hole symmetry of the Hubbard model.
Weiting Chen, Jun Zhang, Hanqin Ding
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Bipolarons in the extended Holstein Hubbard model [PDF]
Physical Review B, 2001 We numerically and analytically calculate the properties of the bipolaron in an extended Hubbard Holstein model, which has a longer range electron-phonon coupling like the Fr\" ohlich model. In the strong coupling regime, the effective mass of the bipolaron in the extended model is much smaller than the Holstein bipolaron mass.
Bonca, J., Trugman, S. A.
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Theoretical investigation of four-body interaction in the one-dimensional extended Hubbard model
Results in Physics, 2022 In the weak-coupling regime, we analytically investigate phase diagram of a one-dimensional half-filled extended Hubbard model with nearest neighboring four-electron interaction (Q), in addition to the usual two-electron couplings (U,V>0). The additional
Weiting Chen, Hanqin Ding, Jun Zhang
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Understanding symmetry breaking in twisted bilayer graphene from cluster constraints
Physical Review Research, 2023 Twisted bilayer graphene is an exciting platform for exploring correlated quantum phases, extremely tunable with respect to both the single-particle bands and the interaction profile of electrons. Here, we investigate the phase diagram of twisted bilayer
Nikita Astrakhantsev +4 more
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Extended Bose–Hubbard model with dipolar excitons
Nature, 2022 14 pages, 7 ...
Lagoin, Camille +9 more
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Applications of Time-Dependent Density-Matrix Approach
Frontiers in Physics, 2020 The equations of motion for reduced density matrices form a coupled chain known as the Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy. To close the coupled chain at the two-body level, approximations for a three-body density matrix with one-body ...
Mitsuru Tohyama
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Stripes in the extended $t-t^\prime$ Hubbard model: A Variational Monte Carlo analysis
SciPost Physics, 2022 By using variational quantum Monte Carlo techniques, we investigate the instauration of stripes (i.e., charge and spin inhomogeneities) in the Hubbard model on the square lattice at hole doping $\delta=1/8$, with both nearest- ($t$) and next-nearest ...
Vito Marino, Federico Becca, Luca F. Tocchio
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Bose-Hubbard realization of fracton defects
Physical Review Research, 2022 Bose-Hubbard models are simple paradigmatic lattice models used to study dynamics and phases of quantum bosonic matter. We combine the extended Bose-Hubbard model in the hard-core regime with ring-exchange hoppings.
Krzysztof Giergiel +3 more
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Communications Physics, 2022 Recent experiments have identified the underlying model of one-dimensional cuprate chains as the extended Hubbard model with attractive near-neighbor interactions. Here, the authors use many-body calculations to create an exact ground-state phase diagram
Dai-Wei Qu +4 more
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Phase Diagram of the Triangular Extended Hubbard Model [PDF]
Physical Review Letters, 2014 5 pages, 5 figures.
TOCCHIO, LUCA FAUSTO +3 more
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