Výsledky vyhledávání - "Frederic Hebert"

Quantum Monte Carlo study of an anharmonic Holstein model

Autor: G. Paleari, Frederic Hebert, Benjamin Cohen-Stead, Rt. Scalettar, Kipton Barros, G. George Batrouni

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2021
Physical Review B, American Physical Society, 2021, 103 (19), ⟨10.1103/PhysRevB.103.195117⟩

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69245c7ed2b888adbbd81f7536ef1414

Zobrazit plný text záznamu

Transfer learning for scalability of neural-network quantum states

Autor: Frederic Hebert, Ryan Tan, Remmy A. M. Zen, Long My, Dario Poletti, Christian Miniatura, Mario Gattobigio, Stéphane Bressan

Publikováno v: Physical Review E
Physical Review E, American Physical Society (APS), 2020, 101 (5), ⟨10.1103/PhysRevE.101.053301⟩

Neural-network quantum states have shown great potential for the study of many-body quantum systems. In statistical machine learning, transfer learning designates protocols reusing features of a machine learning model trained for a problem to solve a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb9c1c398135dec49fd10c0e89df0eb2
https://hal.archives-ouvertes.fr/hal-03118495

Zobrazit plný text záznamu

Two-photon Rabi-Hubbard and Jaynes-Cummings-Hubbard models: Photon-pair superradiance, Mott insulator, and normal phases

Autor: Frederic Hebert, Shifeng Cui, G. George Batrouni, Benoît Grémaud, Wenan Guo, Valery Rousseau

Publikováno v: Physical Review A
Physical Review A, American Physical Society 2019, 100 (3), pp.033608. ⟨10.1103/PhysRevA.100.033608⟩
Physical Review A, American Physical Society 2019, 100 (3), ⟨10.1103/PhysRevA.100.033608⟩
Physical Review A, 2019, 100 (3), pp.033608. ⟨10.1103/PhysRevA.100.033608⟩

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65154291da09b735e7439e506318bf2a
https://hal.archives-ouvertes.fr/hal-02400002

Zobrazit plný text záznamu

Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions

Autor: G. George Batrouni, Frederic Hebert, Bo Xiao, Richard T. Scalettar

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2019, 99 (20), ⟨10.1103/PhysRevB.99.205145⟩
Physical Review B, American Physical Society, 2019, 99 (20)

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd591bd3dfa1eed3a1dd314894ade9fd
https://hal.archives-ouvertes.fr/hal-03261757

Zobrazit plný text záznamu

One-dimensional Hubbard-Holstein model with finite-range electron-phonon coupling

Autor: Frederic Hebert, Richard T. Scalettar, Valery Rousseau, G. George Batrouni, Bo Xiao

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2019, 99 (7), ⟨10.1103/PhysRevB.99.075108⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 99 (7), ⟨10.1103/PhysRevB.99.075108⟩

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb4408e7a60201ccd0c3f0bf91e702b8
https://hal.archives-ouvertes.fr/hal-03261755

Zobrazit plný text záznamu

Phase diagram of bosons in a two-dimensional optical lattice with infinite-range cavity-mediated interactions

Autor: T. Flottat, Valery Rousseau, George Batrouni, Frederic Hebert, L. de Forges de Parny

Publikováno v: Physical Review B. 95

A high-finesse optical cavity allows the establishment of long-range interactions between bosons in an optical lattice when most cold-atom experiments are restricted to short-range interactions. Supersolid phases have recently been experimentally obs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ecba4031a5cafa9a2436a785482e8953
https://doi.org/10.1103/physrevb.95.144501

Zobrazit plný text záznamu

Bosonic Kondo-Hubbard model

Autor: Frederic Hebert, G. George Batrouni, Richard T. Scalettar, T. Flottat, Valery Rousseau

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdbdf94fdb17d2a10d96e91302343bc5
https://hal.archives-ouvertes.fr/hal-01781148

Zobrazit plný text záznamu

Superconducting Transitions in Flat Band Systems

Autor: Richard T. Scalettar, George Batrouni, Frederic Hebert, Vladimir Iglovikov, Benoît Grémaud

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2014, 90 (9), ⟨10.1103/PhysRevB.90.094506⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90 (9), ⟨10.1103/PhysRevB.90.094506⟩

The physics of strongly correlated quantum particles within a flat band was originally explored as a route to itinerant ferromagnetism and, indeed, a celebrated theorem by Lieb rigorously establishes that the ground state of the repulsive Hubbard mod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73f1804598d61514420f31204e57e9f8
http://arxiv.org/abs/1404.5482

Zobrazit plný text záznamu

Magnetic critical behavior of the Ising model on fractal structures

Autor: Frederic Hebert, Pascal Monceau, Michel Perreau

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 1998, 58 (10), pp.6386. ⟨10.1103/PhysRevB.58.6386⟩
Physical Review B : Condensed matter and materials physics
Physical Review B : Condensed matter and materials physics, American Physical Society, 1998, 58 (10), pp.6386. ⟨10.1103/PhysRevB.58.6386⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 1998, 58 (10), pp.6386. ⟨10.1103/PhysRevB.58.6386⟩

International audience; The critical temperature and the set of critical exponents (β,γ,ν) of the Ising model on a fractal structure, namely the Sierpiński carpet, are calculated from a Monte Carlo simulation based on the Wolff algorithm together

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3acbba5192c2587c1aca500244fa2a0
https://doi.org/10.1103/physrevb.58.6386

Zobrazit plný text záznamu

Exotic phases of interactingp-band bosons

Autor: Congjun Wu, Valery Rousseau, G. George Batrouni, Zi Cai, Richard T. Scalettar, Frederic Hebert

We study a model of interacting bosons that occupy the first excited p-band states of a two-dimensional optical lattice. In contrast to the much studied single band Bose-Hubbard Hamiltonian, this more complex model allows for non-trivial superfluid p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e440cb786f985cb6cf77952a0e0f6ba
https://doi.org/10.1103/physrevb.87.224505

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání