Zobrazeno 1 - 10
of 2 085
pro vyhledávání: '"Hebert F"'
Publikováno v:
Physical Review B108, 075119 (2023)
The Holstein Hamiltonian describes itinerant electrons whose site density couples to local phonon degrees of freedom. In the single site limit, at half-filling, the electron-phonon coupling results in a double well structure for the lattice displacem
Externí odkaz:
http://arxiv.org/abs/2303.13708
Publikováno v:
Phys. Rev. B 103, 195117 (2021)
We study the effects of anharmonicity on the physics of the Holstein model, which describes the coupling of itinerant fermions and localized quantum phonons, by introducing a quartic term in the phonon potential energy. We find that the presence of t
Externí odkaz:
http://arxiv.org/abs/2101.08285
Publikováno v:
Phys. Rev. A 100, 063608 (2019)
We study the Tan's contact of a one dimensional quantum gas of N repulsive identical bosons confined in a harmonic trap at finite temperature. This canonical ensemble framework corresponds to the experimental conditions, the number of particles being
Externí odkaz:
http://arxiv.org/abs/1908.08714
Publikováno v:
Phys. Rev. A 100, 033608 (2019)
We study the ground state phase diagrams of two-photon Dicke, the one-dimensional Jaynes-Cummings-Hubbard (JCH), and Rabi-Hubbard (RH) models using mean field, perturbation, quantum Monte Carlo (QMC), and density matrix renormalization group (DMRG) m
Externí odkaz:
http://arxiv.org/abs/1904.05258
Publikováno v:
Phys. Rev. B 99, 205145 (2019)
Recent studies of pairing and charge order in materials such as FeSe, SrTiO$_3$, and 2H-NbSe$_2$ have suggested that momentum dependence of the electron-phonon coupling plays an important role in their properties. Initial attempts to study Hamiltonia
Externí odkaz:
http://arxiv.org/abs/1903.08533
Publikováno v:
Phys. Rev. B 99, 075108 (2019)
The Hubbard-Holstein model describes fermions on a discrete lattice, with on-site repulsion between fermions and a coupling to phonons that are localized on sites. Generally, at half-filling, increasing the coupling $g$ to the phonons drives the syst
Externí odkaz:
http://arxiv.org/abs/1811.07811
Autor:
Paul Goren
Publikováno v:
The Journal of Politics. 71:748-752
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65e22a97447262ea9df65f942d55bb37
https://doi.org/10.1017/s0022381609090586
https://doi.org/10.1017/s0022381609090586
Publikováno v:
Phys. Rev. B 95, 144501 (2017)
High-finesse optical cavity allows the establishment of long-range interactions between bosons in an optical lattice when most cold atoms experiments are restricted to short-range interactions. Supersolid phases have recently been experimentally obse
Externí odkaz:
http://arxiv.org/abs/1701.01624
Publikováno v:
Eur. Phys. J. D {\bf 70}, 213 (2016)
We study, using quantum Monte Carlo (QMC) simulations, the ground state properties of a one dimensional Rabi-Hubbard model. The model consists of a lattice of Rabi systems coupled by a photon hopping term between near neighbor sites. For large enough
Externí odkaz:
http://arxiv.org/abs/1603.01126
Publikováno v:
Phys. Rev. B 92, 035101 (2015)
We study, using quantum Monte-Carlo simulations, the bosonic Kondo-Hubbard model in a two dimensional square lattice. We explore the phase diagram and analyse the mobility of particles and magnetic properties. At unit filling, the transition from a p
Externí odkaz:
http://arxiv.org/abs/1502.06202