Zobrazeno 1 - 10
of 53
pro vyhledávání: '"J. C. Xavier"'
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We demonstrate that in a class of disordered quantum systems the dynamical partition function is not an analytical function in a time window after certain quantum quenches. We related this behavior to rare and large regions with atypical inhomogeneit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c701585d8131b38a3e09bbabd1f8f7d2
http://arxiv.org/abs/2201.09847
http://arxiv.org/abs/2201.09847
The spin-1/2 transverse field two-leg Ising ladder with nearest-neighbor exchange and plaquette four-spin interaction $J_{4}$ is studied analytically and numerically with the density matrix renormalization group approach. The quantum phase diagram in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85dde3f530c860beba753e372d8b3017
http://arxiv.org/abs/2111.11404
http://arxiv.org/abs/2111.11404
Weakly coupled Ising chains provide a condensed-matter realization of confinement. In these systems, kinks and antikinks bind into mesons due to an attractive interaction potential that increases linearly with the distance between the particles. Whil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dacad2fdea0fc142e120c78290417bd5
http://arxiv.org/abs/2005.03145
http://arxiv.org/abs/2005.03145
Autor:
M. A. Rajabpour, J. C. Xavier
We calculate the entanglement and the universal boundary entropy (BE) in the critical quantum spin chains, such as the transverse field Ising chain and the XXZ chain, with arbitrary direction of the boundary magnetic field (ADBMF). We determine the b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42b7103298e40d65056b172eec000b18
http://arxiv.org/abs/2003.00095
http://arxiv.org/abs/2003.00095
Publikováno v:
Applicable Analysis. 97:610-632
In this paper we perform a stability analysis of a fully discrete numerical method for the solution of a family of Boussinesq systems, consisting of a Fourier collocation spectral method for the spatial discretization and a explicit fourth order Rung
Publikováno v:
Repositório Institucional da Unicamp
Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
Repositório da Produção Científica e Intelectual da Unicamp
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
Repositório da Produção Científica e Intelectual da Unicamp
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
We propose a simple modification of the density matrix renormalization group (DMRG) method in order to tackle strongly disordered quantum spin chains. Our proposal, akin to the idea of the adaptive time-dependent DMRG, enables us to reach larger syst
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The entanglement in a quantum system that possess an internal symmetry, characterized by the Sz-magnetization or U(1)-charge, is distributed among different sectors. The aim of this letter is to gain a deeper understanding of the contribution to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69dfe965b57bd26f939ecb96361d7ce4
Publikováno v:
Physical review. E. 95(1-1)
The phase diagram and the critical behavior of the spin-1 and the spin-3/2 two-dimensional Baxter-Wu model in a crystal field are studied by conventional finite-size scaling and conformal invariance theory. The phase diagram of this model, for the sp
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Physical Review B-Condensed Matter and Materials Physics, 93(19):195129. American Institute of Physics
Universidade de São Paulo (USP)
instacron:USP
Physical Review B-Condensed Matter and Materials Physics, 93(19):195129. American Institute of Physics
We study the influence of reflective boundaries on time-dependent responses of one-dimensional quantum fluids at zero temperature beyond the low-energy approximation. Our analysis is based on an extension of effective mobile impurity models for nonli
Publikováno v:
Journal of Physics: Conference Series. 921:012003
Conventional finite-size scaling and conformal invariance theory are used in order to study the critical behavior of the spin-1 and spin-3/2 Baxter-Wu model. For spin-1 the results are similar to the Blume-Capel model. However, for spin-3/2, the phas