Zobrazeno 1 - 10
of 24
pro vyhledávání: '"F E A dos Santos"'
Publikováno v:
New Journal of Physics, Vol 25, Iss 6, p 063015 (2023)
A key aspect of ultracold bosonic quantum gases in deep optical lattice potential wells is the realization of the strongly interacting Mott insulating phase. Many characteristics of this phase are well understood, however little is known about the ef
Externí odkaz:
https://doaj.org/article/93090926a45b45bfb40684e7dcf83bd0
Publikováno v:
New Journal of Physics, Vol 23, Iss 8, p 083007 (2021)
We analyse the distinction between the three different ground states presented by a system of spinless bosons with short-range interactions submitted to a random potential using the disordered Bose–Hubbard model. The criteria for identifying the su
Externí odkaz:
https://doaj.org/article/fd303a30a20e465f84ef78db6879b0c5
Autor:
Áttis V. M. Marino, Lucas Madeira, A. Cidrim, F. E. A. dos Santos, Vanderlei Salvador Bagnato
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 decay of multicharged vortices in trapped Bose-Einstein condensates may lead to a disordered vortex state consistent with the Vinen regime of turbulence, characterized by an absence of large-scale flow and an incompressible kinetic energy spectru
Publikováno v:
Physics Letters B, Vol 790, Iss, Pp 354-360 (2019)
Physics Letters
Physics Letters
We have studied a Lorentz-violating scalar electrodynamics in which the gauge and scalar fields interact via a nonminimal covariant derivative containing CPT-odd and CPT-even backgrounds. By considering the complex scalar field describes a charged me
Publikováno v:
Physical Review A. 101
We address the many-atom emission of a dilute cloud of two-level atoms through a renormalized perturbation theory. An analytical solution for the truncated coupled-dipole equations is derived, which contains an effective spectrum associated to the in
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
Turbulence is characterized by a large number of degrees of freedom, distributed over several length scales, that result into a disordered state of a fluid. The field of quantum turbulence deals with the manifestation of turbulence in quantum fluids,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51a199c22dd14152e16b1a96a7c85323
Autor:
F. E. A. dos Santos, Lucas Madeira, M. Hemmerling, M. A. Caracanhas, A. Cidrim, Vanderlei Salvador Bagnato
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 field of quantum turbulence is related to the manifestation of turbulence in quantum fluids, such as liquid helium and ultracold gases. The concept of turbulence in quantum systems was conceived more than 70 years ago by Onsager and Feynman, but
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3378052a039b3d50e90e40f2d22d9918
The objective of this paper is the theoretical description of the Mott-insulator to superfluid quantum phase transition of a Bose gas in an optical lattice. In former works the Rayleigh-Schr\"odinger perturbation theory was used within a mean-field a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44105e20612948c7e1bf8725fd38e0e9
http://arxiv.org/abs/1804.08689
http://arxiv.org/abs/1804.08689
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
In this work, we analyze the free expansion of Bose-Einstein condensates containing multicharged vortices. The atomic cloud is initially confined in a three-dimensional asymmetric harmonic trap. We apply both approximate variational solutions and num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e272b20114535b5ec0eee50008e9c4d
http://arxiv.org/abs/1710.01384
http://arxiv.org/abs/1710.01384
Publikováno v:
Physical Review D. 94
Following a successfully quantization scheme previously developed in Ref. [R. Casana, M. M. Ferreira, Jr., and F. E. P. dos Santos, Phys. Rev. D 90, 105025 (2014).] for a parity-even gauge sector of the SME, we have established the Gupta-Bleuler quan