Artículo
Quantum phase transitions of atom-molecule Bose mixtures in a double-well potential
Autor/es | Arias Carrasco, José Miguel
Relaño, Armando Dukelsky, Jorge Pérez Fernández, Pedro |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Física Aplicada III |
Fecha de publicación | 2014 |
Fecha de depósito | 2017-09-27 |
Publicado en |
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Resumen | The ground state and spectral properties of Bose gases in double-well potentials are studied in two different scenarios: (i) an interacting atomic Bose gas, and (ii) a mixture of an atomic gas interacting with diatomic ... The ground state and spectral properties of Bose gases in double-well potentials are studied in two different scenarios: (i) an interacting atomic Bose gas, and (ii) a mixture of an atomic gas interacting with diatomic molecules. A ground state second-order quantum phase transition is observed in both scenarios. For large attractive values of the atom-atom interaction, the ground state is degenerate. For repulsive and small attractive interaction, the ground state is not degenerate and is well approximated by a boson coherent state. Both systems depict an excited state quantum phase transition. In both cases, a critical energy separates a region in which all the energy levels are degenerate in pairs, from another region in which there are no degeneracies. For the atomic system, the critical point displays a singularity in the density of states, whereas this behavior is largely smoothed for the mixed atom-molecule system. |
Identificador del proyecto | info:eu-repo/grantAgreement/MINECO/FIS2012-35316
info:eu-repo/grantAgreement/MINECO/FIS2012-34479 info:eu-repo/grantAgreement/MINECO/FIS2011-28738-c02-01 FQM-160 P11-FQM-7632 CSD2007- 00042 |
Cita | Arias Carrasco, J.M., Relaño, A., Dukelsky Bercovich, J. y Pérez Fernández, P. (2014). Quantum phase transitions of atom-molecule Bose mixtures in a double-well potential. Physical Review E, 90 (4), 042139-1-042139-11. |
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