Zobrazeno 1 - 10
of 150 651
pro vyhledávání: '"A Nagaoka"'
Nagaoka ferromagnetism (NF) is a long-predicted example of itinerant ferromagnetism (IF) in the Hubbard model that has been studied theoretically for many years. The condition for NF, an infinite on-site Coulomb repulsion and a single hole in a half-
Externí odkaz:
http://arxiv.org/abs/2404.03889
Autor:
Ellen van Goethem
This is the first work to deal comprehensively with the historical and physical aspects of the Nagaoka palace and capital, which were constructed in the eighth century at the order of Kanmu Tennō, but abruptly abandoned after only ten years. New res
Autor:
Botzung, Thomas, Nataf, Pierre
We provide numerical evidence of the Nagaoka's theorem in the $\mathrm{SU}(N)$ Fermi-Hubbard model on various cluster geometries, such as the square, the honeycomb and the triangular lattices. In particular, by diagonalizing several finite-size clust
Externí odkaz:
http://arxiv.org/abs/2403.11588
Autor:
Samajdar, Rhine, Bhatt, R. N.
Publikováno v:
Phys. Rev. B 109, 235128 (2024)
The search for elusive Nagaoka-type ferromagnetism in the Hubbard model has recently enjoyed renewed attention with the advent of a variety of experimental platforms enabling its realization, including moir\'e materials, quantum dots, and ultracold a
Externí odkaz:
http://arxiv.org/abs/2311.09279
Publikováno v:
Physical Review A 110, 023314 (2024)
We consider the Fermi polaron problem of an impurity hopping around a two-dimensional square lattice and interacting with a sea of fermions at given filling factor. When the interaction is attractive, we find standard Fermi polaron quasiparticles, ca
Externí odkaz:
http://arxiv.org/abs/2312.00385
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Autor:
Lebrat, Martin, Xu, Muqing, Kendrick, Lev Haldar, Kale, Anant, Gang, Youqi, Seetharaman, Pranav, Morera, Ivan, Khatami, Ehsan, Demler, Eugene, Greiner, Markus
Publikováno v:
Nature 629, 317 (2024)
Quantum interference can deeply alter the nature of many-body phases of matter. In the paradigmatic case of the Hubbard model, Nagaoka famously proved that introducing a single itinerant charge can transform a paramagnetic insulator into a ferromagne
Externí odkaz:
http://arxiv.org/abs/2308.12269
Publikováno v:
npj Quantum Mater. 9, 32 (2024)
The dynamical response of a quantum spin liquid upon injecting a hole is a pertinent open question. In experiments, the hole spectral function, measured momentum-resolved in angle-resolved photoemission spectroscopy (ARPES) or locally in scanning tun
Externí odkaz:
http://arxiv.org/abs/2309.15157
Autor:
Thakur, Tanmay1 (AUTHOR), Szafran, Bartłomiej1 (AUTHOR) bszafran@agh.edu.pl
Publikováno v:
Scientific Reports. 11/1/2023, Vol. 13 Issue 1, p1-10. 10p.
Autor:
Suzuki, Jun
In this work we propose a Bayesian version of the Nagaoka-Hayashi bound when estimating a parametric family of quantum states. This lower bound is a generalization of a recently proposed bound for point estimation to Bayesian estimation. We then show
Externí odkaz:
http://arxiv.org/abs/2302.14223