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Browsing by Author "Álvarez Bajo, Osiris"
Now showing items 1-6 of 6
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Anharmonicity effects in the bosonic U(2)-SO(3) excited-state quantum phase transition
Pérez Bernal, Francisco
; Álvarez Bajo, Osiris (American Physical Society, 2010)
We study the effect of the inclusion of the U(2) Lie algebra second-order Casimir operator in a model Hamiltonian of the vibron model two-dimensional limit. We extend previously published results, showing that the inclusion ... -
An Approach to Global Rovibrational Analysis Based on Anharmonic Ladder Operators: Application to Hydrogen Selenide (H80 2 Se)
Álvarez Bajo, Osiris; Carvajal Zaera, Miguel; Pérez Bernal, Francisco (Elsevier, 2012-01)
An algebraic approach to perform global rovibrational analysis of molecular spectra is presented. The approach combines the onedimensional limit of the vibron model with rotational degrees of freedom. The model is based ... -
Equivalent rotations associated with the permutation inversion group revisited: symmetry projection of the rovibrational functions of methane
Álvarez Bajo, Osiris; Lemus, R.; Carvajal Zaera, Miguel; Pérez Bernal, Francisco (Taylor & Francis, 2011)
In this work the analysis of the equivalent rotations from the permutation inversion group formalism is revisited. We emphasize that explicit knowledge of changes in the Euler angles are not required in order to determine ... -
Novel results from an algebraic approach to molecular bending dynamics
Pérez Bernal, Francisco; Álvarez Bajo, Osiris; Arias Carrasco, José Miguel; Carvajal Zaera, Miguel; García Ramos, José Enrique; Larese, Danielle; Pérez Fernández, Pedro (Institute of Physics, 2011)
We present a brief review of research topics of current interest that depend on an algebraic approach to molecular bending dynamics. This approach is based on a u(3) spectrum generating algebra. In particular, we briefly ... -
Raman and infrared spectra of dimethyl ether 13C-isotopologue (CH3O13CH3) from a CCSD(T) potential energy surface
Carvajal Zaera, Miguel; Álvarez Bajo, Osiris; Senent, María Luisa; Domínguez Gómez, R.; Villa, M. (Elsevier, 2012-09)
available. With the aim of providing some clues of its low-lying vibrational bands and with the hope of contributing in a next spectral analysis, a number of vibrational transition frequencies below 300 cm 1 of the ... -
Symmetry projection of the rovibrational functions of methane
Álvarez Bajo, Osiris; Lemus, R.; Carvajal Zaera, Miguel; Pérez Bernal, Francisco (American Institute of Physics, 2010)
In this work we propose a symmetry projection approach to build a rovibrational basis for methane. In our method, symmetry adapted functions are obtained by simultaneous diagonalization of a set of commuting operators, ...
