Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Giancarlo Queiroz Pellegrino"'
An inversion of the Holstein-Primakoff transformation is proposed such that creation and annihilation operators for a bosonic field are rewritten as operators of an SU(2) algebra. In association with more common quadratic combinations for fermionic o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::846eaa798e0dad076572847cfbead673
https://hal.archives-ouvertes.fr/hal-01692913v2
https://hal.archives-ouvertes.fr/hal-01692913v2
Publikováno v:
Physical Review E
Physical Review E, American Physical Society (APS), 2017, 96 (6), ⟨10.1103/PhysRevE.96.062146⟩
Physical Review E, American Physical Society (APS), 2017, 96 (6), ⟨10.1103/PhysRevE.96.062146⟩
In this work we study an effective three-mode model describing interacting bosons. These bosons can be considered as exciton-polaritons in a semiconductor microcavity at the magic angle. This model exhibits quantum phase transition (QPT) when the par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::057e9ddc7ef8043a83c091a002e16001
https://doi.org/10.1103/physreve.96.062146
https://doi.org/10.1103/physreve.96.062146
Chaos-based potentials are defined and implemented in the one-dimensional tight-binding model as a way of simulating disorder-controlled crystalline lattices. In this setting, disorder is handled with the aid of the chaoticity parameter. The inverse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::394423deee1434369be0e937edde1b85
http://arxiv.org/abs/1712.07729
http://arxiv.org/abs/1712.07729
Autor:
Giancarlo Queiroz Pellegrino, Joao Rogerio da Silva, Jose Geraldo Peixoto de Faria, Marcio Matias Afonso
Publikováno v:
2016 IEEE Conference on Electromagnetic Field Computation (CEFC).
Differential quadrature methods are devised to numerically solve ordinary and partial differential equations by approximating the derivatives of the unknown function at points of a cloud defined on the domain of interest as weighted sums of the value
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::384bdd063a3e95a1ef82d1f9f1d7817e
https://doi.org/10.1109/cefc.2016.7816366
https://doi.org/10.1109/cefc.2016.7816366
Publikováno v:
TEMA (São Carlos) v.15 n.2 2014
TEMA (Sociedade Brasileira de Matemática Aplicada e Computacional. Online)
Sociedade Brasileira de Matemática Aplicada e Computacional
instacron:SBMAC
TEMA (São Carlos), Volume: 15, Issue: 2, Pages: 203-209, Published: AUG 2014
TEMA, Vol 15, Iss 2, Pp 203-209
TEMA (Sociedade Brasileira de Matemática Aplicada e Computacional. Online)
Sociedade Brasileira de Matemática Aplicada e Computacional
instacron:SBMAC
TEMA (São Carlos), Volume: 15, Issue: 2, Pages: 203-209, Published: AUG 2014
TEMA, Vol 15, Iss 2, Pp 203-209
Chaotic sequences are sequences generated by chaotic maps. A particle moving in a one-dimensional space has its behavior modeled according to the time-independent Schrödinger equation. The tight-binding approximation enables the use of chaotic seque
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::320c95262577133507850ab1f472fbd6
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-84512014000200007
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-84512014000200007
Autor:
Giancarlo Queiroz Pellegrino
Publikováno v:
Journal of Physics: Condensed Matter. 13:8121-8134
Persistent currents and Drude weights are investigated for the tight-binding approximation to one-dimensional rings threaded by a magnetic flux and with potential given by some almost-periodic substitution sequences with different degrees of randomne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c88adae895ad389a177c4aba0698acb8
https://doi.org/10.1088/0953-8984/13/35/317
https://doi.org/10.1088/0953-8984/13/35/317
Publikováno v:
Scopus-Elsevier
We show that rapid decoherence, usually associated with chaotic dynamics, is not necessarily a hallmark of nonintegrability: border effects in integrable systems may produce similarly drastic decoherence rates. These can be found when the subsystem u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d732d988b0bd45156d901a664fba151
https://doi.org/10.1103/physreve.60.5407
https://doi.org/10.1103/physreve.60.5407
Publikováno v:
Physics Letters A. 259:399-402
By using two almost periodic driven potentials derived from substitution sequences, effectively mimicking an infinite number of frequencies, we numerically find different exponents for the diffusion constant as an indication that the limit of infinit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fab1796a464a91a7466f8fa253ea971
https://doi.org/10.1016/s0375-9601(99)00424-7
https://doi.org/10.1016/s0375-9601(99)00424-7
Publikováno v:
Physical Review Letters. 80:5524-5527
Manifestation of chaotic behavior is found in an intrinsically quantum property. The entanglement process, quantitatively expressed in terms of the reduced density linear entropy, is studied for the $N$-atom Jaynes-Cummings model. For a given energy,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14745cd8d663b0b0b2c9741927baf64b
https://doi.org/10.1103/physrevlett.80.5524
https://doi.org/10.1103/physrevlett.80.5524
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 253:188-198
The classical and quantum versions of the kicked rotator with two identical particles are considered. The particle interaction is only through identification and its configuration space is a Mobius strip. The classical dynamics presents no localizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed44bf653dc2eea4d17b1b41a8a73266
https://doi.org/10.1016/s0378-4371(98)00039-9
https://doi.org/10.1016/s0378-4371(98)00039-9