Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Federico Becca"'
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-8 (2024)
Abstract Neural-network architectures have been increasingly used to represent quantum many-body wave functions. These networks require a large number of variational parameters and are challenging to optimize using traditional methods, as gradient de
Externí odkaz:
https://doaj.org/article/8d4a53f3e612419aa42ce679e59d3a25
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043082 (2021)
The existence of a gapped chiral spin liquid has been recently suggested in the vicinity of the metal-insulator transition of the Hubbard model on the triangular lattice, by intensive density-matrix renormalization group (DMRG) simulations [A. Szasz,
Externí odkaz:
https://doaj.org/article/d3926acf52ff4df7afe0e2e39d134216
Autor:
Francesco Ferrari, Federico Becca
Publikováno v:
Physical Review X, Vol 9, Iss 3, p 031026 (2019)
Understanding the nature of the excitation spectrum in quantum spin liquids is of fundamental importance, in particular for the experimental detection of candidate materials. However, current theoretical and numerical techniques have limited capabili
Externí odkaz:
https://doaj.org/article/a0e1035aa59e4944a7ef9b19dc6b5e8d
Publikováno v:
New Journal of Physics, Vol 19, Iss 10, p 103033 (2017)
Motivated by recent experimental suggestions of charge-order-driven ferroelectricity in organic charge-transfer salts, such as κ -(BEDT-TTF) _2 Cu[N(CN) _2 ]Cl, we investigate magnetic and charge-ordered phases that emerge in an extended two-orbital
Externí odkaz:
https://doaj.org/article/93a5c268cdaf4560a44340d54765fc61
Autor:
J. P. F. LeBlanc, Andrey E. Antipov, Federico Becca, Ireneusz W. Bulik, Garnet Kin-Lic Chan, Chia-Min Chung, Youjin Deng, Michel Ferrero, Thomas M. Henderson, Carlos A. Jiménez-Hoyos, E. Kozik, Xuan-Wen Liu, Andrew J. Millis, N. V. Prokof’ev, Mingpu Qin, Gustavo E. Scuseria, Hao Shi, B. V. Svistunov, Luca F. Tocchio, I. S. Tupitsyn, Steven R. White, Shiwei Zhang, Bo-Xiao Zheng, Zhenyue Zhu, Emanuel Gull
Publikováno v:
Physical Review X, Vol 5, Iss 4, p 041041 (2015)
Numerical results for ground-state and excited-state properties (energies, double occupancies, and Matsubara-axis self-energies) of the single-orbital Hubbard model on a two-dimensional square lattice are presented, in order to provide an assessment
Externí odkaz:
https://doaj.org/article/08a162cb82304823bb40b7d5f51d3cf6
Publikováno v:
SciPost Physics, Vol 12, Iss 5, p 166 (2022)
Neural networks have been recently proposed as variational wave functions for quantum many-body systems [G. Carleo and M. Troyer, Science 355, 602 (2017)]. In this work, we focus on a specific architecture, known as Restricted Boltzmann Machine (R
Externí odkaz:
https://doaj.org/article/a48c0b68debc494a9254eda818bbf79c
Publikováno v:
Physical Review B. 106
Taking the clue from the modern theory of polarization [Rev. Mod. Phys. 66, 899 (1994)], we identify an operator to distinguish between Z2-even (trivial) and Z2-odd (topological) insulators in two spatial dimen- sions. Its definition extends the posi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6765a7e02924406f79d4af53324a2ecd
https://doi.org/10.1103/physrevb.106.l161106
https://doi.org/10.1103/physrevb.106.l161106
Publikováno v:
SciPost Physics. 12
By using variational quantum Monte Carlo techniques, we investigate the instauration of stripes (i.e., charge and spin inhomogeneities) in the Hubbard model on the square lattice at hole doping $\delta=1/8$, with both nearest- ($t$) and next-nearest-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1979af89a02b6f9d211e7d3762906d3
https://doi.org/10.21468/scipostphys.12.6.180
https://doi.org/10.21468/scipostphys.12.6.180
Publikováno v:
SciPost Physics, Vol 6, Iss 2, p 018 (2019)
Short-range antiferromagnetic correlations are known to open a spin gap in the repulsive Hubbard model on ladders with $M$ legs, when $M$ is even. We show that the spin gap originates from the formation of correlated pairs of electrons with opposi
Externí odkaz:
https://doaj.org/article/be32f234c8d948fd8b125d26a901bcbb
Neural networks have been recently proposed as variational wave functions for quantum many-body systems [G. Carleo and M. Troyer, Science 355, 602 (2017)]. In this work, we focus on a specific architecture, known as Restricted Boltzmann Machine (RBM)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a6b900dac2f1dafec7b7434e99e0d11
