RT Journal Article
T1 Anharmonicity effects in the bosonic U(2)-SO(3) excited-state quantum phase transition
A1 Pérez Bernal, Francisco
A1 Álvarez Bajo, Osiris
AB We study the effect of the inclusion of the U(2) Lie algebra second-order Casimir operator in a modelHamiltonian of the vibron model two-dimensional limit. We extend previously published results, showing thatthe inclusion of the additional term does not alter the ground-state quantum phase transition between thesymmetric and deformed limits of the model. Nevertheless, the inclusion of this operator implies deep changeson the excitation spectrum and on the ensuing excited-state quantum phase transitions.
PB American Physical Society
SN 1050-2947
SN 1094-1622 (electrónico)
SN 10.1103/PhysRevA.81.050101
YR 2010
FD 2010
LK http://hdl.handle.net/10272/8008
UL http://hdl.handle.net/10272/8008
LA eng
NO Pérez Bernal, F., Álvarez Bajo, O.: "Anharmonicity effects in the bosonic U(2)-SO(3) excited-state quantum phase transition". Physical Review A. Vol. 81, 050101 (2010). ISSN 1050-2947
DS Repositorio Institucional de la Universidad de Huelva
RD 15 jul 2026