Zobrazeno 1 - 10
of 80 427
pro vyhledávání: '"P A, Hubbard"'
Autor:
Scholle, Robin, Classen, Laura
We perform unrestricted Hartree-Fock calculations on the 2D Hubbard model on a honeycomb and bilayer honeycomb lattice at both zero and finite temperatures. Finite size real space calculations are supplemented with RPA calculations in the thermodynam
Externí odkaz:
http://arxiv.org/abs/2412.15945
Autor:
Weber, Manuel
The Hubbard-Holstein model is one of the central models that describe the competition between electron-electron and electron-phonon interactions. In one dimension and at half-filling, the interplay between an electronic spin-density wave and a phonon
Externí odkaz:
http://arxiv.org/abs/2412.13263
Using the time-dependent Lanczos method, we study the non-equilibrium dynamics of the half-filled one-dimensional ionic Hubbard model, deep within the Mott insulating regime, under the influence of a transient laser pulse. In equilibrium, increasing
Externí odkaz:
http://arxiv.org/abs/2412.05798
Quantum computing holds immense promise for simulating quantum systems, a critical task for advancing our understanding of complex quantum phenomena. One of the primary goals in this domain is to accurately approximate the ground state of quantum sys
Externí odkaz:
http://arxiv.org/abs/2411.18535
We numerically benchmark 30 optimisers on 372 instances of the variational quantum eigensolver for solving the Fermi-Hubbard system with the Hamiltonian variational ansatz. We rank the optimisers with respect to metrics such as final energy achieved
Externí odkaz:
http://arxiv.org/abs/2411.13742
We conduct a systematic investigation of the role of Hubbard U corrections in electronic structure calculations of two-dimensional (2D) materials containing 3d transition metals. Specifically, we use density functional theory (DFT) with the PBE and P
Externí odkaz:
http://arxiv.org/abs/2411.10790
Autor:
Carmelo, J. M. P., Sacramento, P. D.
Publikováno v:
Physical Review B 110, L201108 (2024)
The use of hydrodynamic transport theory seems to indicate that the charge diffusion constant D of the one-dimensional (1D) half-filled Hubbard model, whose Drude weight vanishes, diverges for temperature T>0, which would imply anomalous superdiffusi
Externí odkaz:
http://arxiv.org/abs/2411.10783
Autor:
Kennedy, Welberth, Sousa-Júnior, Sebastião dos Anjos, Costa, Natanael C., Santos, Raimundo R. dos
The lack of both nesting and a van Hove singularity at half filling, together with the presence of Dirac cones makes the honeycomb lattice a special laboratory to explore strongly correlated phenomena. For instance, at zero temperature the repulsive
Externí odkaz:
http://arxiv.org/abs/2411.07429
Autor:
Ibarra-García-Padilla, Eduardo, Lange, Hannah, Melko, Roger G, Scalettar, Richard T, Carrasquilla, Juan, Bohrdt, Annabelle, Khatami, Ehsan
Neural quantum states (NQS) have emerged as a powerful ansatz for variational quantum Monte Carlo studies of strongly-correlated systems. Here, we apply recurrent neural networks (RNNs) and autoregressive transformer neural networks to the Fermi-Hubb
Externí odkaz:
http://arxiv.org/abs/2411.07144
Autor:
Kan, Angus, Symons, Benjamin
Exploring low-cost applications is paramount to creating value in early fault-tolerant quantum computers. Here we optimize both gate and qubit counts of recent algorithms for simulating the Fermi-Hubbard model. We further devise and compile algorithm
Externí odkaz:
http://arxiv.org/abs/2411.02160