Results 21 to 30 of about 266,938 (298)
Quantum fluctuations approach to the nonequilibrium GW approximation
Condensed Matter Physics, 2022 The quantum dynamics of fermionic or bosonic many-body systems following external excitation can be successfully studied using two-time nonequilibrium Green's functions (NEGF) or single-time reduced density matrix methods.
E. Schroedter, J.-P. Joost, M. Bonitz
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Ferromagnetism in Hubbard Models [PDF]
Physical Review Letters, 1995 We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U.
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Physical Review X, 2020 A method to calculate the one-body Green’s function for ground states of correlated electron materials is formulated by extending the variational Monte Carlo method.
Maxime Charlebois, Masatoshi Imada
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Thermodynamics of correlated electrons in a magnetic field
Communications Physics, 2022 The Hofstadter–Hubbard model on 2D square lattices is a paradigmatic model to study the interplay of electron correlations and external magnetic field.
Jixun K. Ding +5 more
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One Dimensional Bose-Hubbard Model Simulatation of Quantum Gas in Optical Lattice [PDF]
Jisuanji gongcheng, 2018 For the one-dimensional Bose-Hubbard theoretical model of condensed matter,the quantum phase transition process of the superfluid-Mott insulation state in the one-dimensional Bose-Hubbard model is realized by continuously changing the depth of the ...
LUAN Tian,ZHANG Xuesong,CHEN Xuzong
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Hubbard model with Lüscher fermions [PDF]
Nuclear Physics B, 1998 49 pages, Latex, 11 Postscript figures, uses psfrag ...
Sawicki, P., Wosiek, J.
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Ultracold atoms in optical lattices [PDF]
, 2003 Bosonic atoms trapped in an optical lattice at very low temperatures, can be modeled by the Bose-Hubbard model. In this paper, we propose a slave-boson approach for dealing with the Bose-Hubbard model, which enables us to analytically describe the ...
D. B. M. Dickerscheid +14 more
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Quantum Simulation of the Hubbard Model: The Attractive Route [PDF]
, 2009 We study the conditions under which, using a canonical transformation, the phases sought after for the repulsive Hubbard model, namely a Mott insulator in the paramagnetic and anti-ferromagnetic phases, and a putative d-wave superfluid can be deduced ...
Cazalilla, M. A. +2 more
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Two-site dynamical mean field theory for the dynamic Hubbard model
, 2010 At zero temperature, two-site dynamical mean field theory is applied to the Dynamic Hubbard model. The Dynamic Hubbard model describes the orbital relaxation that occurs when two electrons occupy the same site, by using a two-level boson field at each ...
Bach, G., Hirsch, J. E., Marsiglio, F.
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Interaction Quench in the Hubbard Model [PDF]
Physical Review Letters, 2008 Final version as ...
Moeckel, M., Kehrein, S.
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