Zobrazeno 1 - 10
of 258
pro vyhledávání: '"VITALI, ETTORE"'
Autor:
Apostoli, Christian, Kelly, Patrick, Lopez, Annette, Dauer, Kaelyn, Bertaina, Gianluca, Galli, Davide Emilio, Vitali, Ettore
Publikováno v:
Phys. Rev. A 110, 033306 (2024)
We leverage random phase approximation and unbiased auxiliary-field quantum Monte Carlo methods to compute dynamical correlations for a dilute homogeneous two-dimensional attractive Fermi gas. Our main purpose is to quantitatively study the collectiv
Externí odkaz:
http://arxiv.org/abs/2403.13636
Autor:
Feng, Chunhan, Ibarra-García-Padilla, Eduardo, Hazzard, Kaden R. A., Scalettar, Richard, Zhang, Shiwei, Vitali, Ettore
Publikováno v:
Phys. Rev. Research 5, 043267 (2023)
We use state-of-the-art numerical techniques to compute ground state correlations in the two-dimensional SU(3) Fermi Hubbard model at $1/3$-filling, modeling fermions with three possible spin flavors moving on a square lattice with an average of one
Externí odkaz:
http://arxiv.org/abs/2306.16464
Publikováno v:
Phys. Rev. Research 4.013239(2022)
We determine the spin and charge orders in the ground state of the doped two-dimensional (2D) Hubbard model in its simplest form, namely with only nearest-neighbor hopping and on-site repulsion. At half-filling, the ground state is known to be an ant
Externí odkaz:
http://arxiv.org/abs/2112.02187
Publikováno v:
Phys. Rev. Lett. 128, 203201, 2022
Leveraging cutting-edge numerical methodologies, we study the ground state of the two-dimensional spin-polarized Fermi gas in an optical lattice. We focus on systems at high density and small spin polarization, corresponding to the parameter regime b
Externí odkaz:
http://arxiv.org/abs/2110.06159
From flow without dissipation of energy to the formation of vortices when placed within a rotating container, the superfluid state of matter has proven to be a very interesting physical phenomenon. Here we present the key mechanisms behind superfluid
Externí odkaz:
http://arxiv.org/abs/2012.04149
Publikováno v:
Phys. Rev. B 102, 214512 (2020)
We perform extensive auxiliary-field quantum Monte Carlo (AFQMC) calculations for the three-band Hubbard (Emery) model in order to study the ground-state properties of Copper-Oxygen planes in the cuprates. Employing cutting-edge AFQMC techniques with
Externí odkaz:
http://arxiv.org/abs/2008.06527
Publikováno v:
Phys. Rev. A 102, 053324 (2020)
Interfacing unbiased quantum Monte Carlo simulations with state-of-art analytic continuation techniques, we obtain exact numerical results for dynamical density and spin correlations in the attractive Hubbard model, describing a spin-balanced two-dim
Externí odkaz:
http://arxiv.org/abs/1912.06272
Autor:
Qin, Mingpu, Chung, Chia-Min, Shi, Hao, Vitali, Ettore, Hubig, Claudius, Schollwöck, Ulrich, White, Steven R., Zhang, Shiwei
Publikováno v:
Phys. Rev. X 10, 031016 (2020)
We study the superconducting pairing correlations in the ground state of the doped Hubbard model -- in its original form without hopping beyond nearest neighbor or other perturbing parameters -- in two dimensions at intermediate to strong coupling an
Externí odkaz:
http://arxiv.org/abs/1910.08931
Autor:
Vitali, Ettore, Nunez, Jimmy Gonzalez
The primary work presented in this paper focuses on the calculation of density-density dynamical correlations in an attractive two dimensional Fermi gas in several physically interesting regimes, including the strongly correlated BEC-BCS crossover re
Externí odkaz:
http://arxiv.org/abs/1905.05737
Publikováno v:
Phys. Rev. A 100, 023621 (2019)
We introduce an efficient and numerically stable technique to make use of a BCS trial wave function in the computation of correlation functions of strongly correlated quantum fermion systems. The technique is applicable to any projection approach inv
Externí odkaz:
http://arxiv.org/abs/1905.05012