Classical bifurcation in a quadrupolar NMR system


Autoria(s): Ferreira, A. G. Araújo; Auccaise, R.; Sarthour, R. S.; Oliveira, I. S.; Bonagamba, Tito Jose; Roditi, I.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

28/05/2014

28/05/2014

01/05/2013

Resumo

The Josephson junction model is applied to the experimental implementation of classical bifurcation in a quadrupolar nuclear magnetic resonance system. There are two regimes, one linear and one nonlinear, which are implemented by the radio-frequency and the quadrupolar terms of the Hamiltonian of a spin system, respectively. These terms provide an explanation of the symmetry breaking due to bifurcation. Bifurcation depends on the coexistence of both regimes at the same time in different proportions. The experiment is performed on a lyotropic liquid crystal sample of an ordered ensemble of 133Cs nuclei with spin I = 7/2 at room temperature. Our experimental results confirm that bifurcation happens independently of the spin value and of the physical system. With this experimental spin scenario, we confirm that a quadrupolar nuclei system could be described analogously to a symmetric two-mode Bose-Einstein condensate.

CNPq

CAPES

FAPESP

FAPERJ

INCT-IQ

Identificador

Physical Review A, College Park : American Physical Society - APS, v. 87, n. 5, p. 053605-1-053605-5, May 2013

1050-2947

http://www.producao.usp.br/handle/BDPI/45108

10.1103/PhysRevA.87.053605

Idioma(s)

eng

Publicador

American Physical Society - APS

College Park

Relação

Physical Review A

Direitos

restrictedAccess

Copyrigth American Physical Society

Palavras-Chave #CONDENSADO DE BOSE-EINSTEIN #SPIN #RESSONÂNCIA MAGNÉTICA NUCLEAR
Tipo

article

original article

publishedVersion