Ponencia
A beyond mean-field study of the Tavis- Cummings model
Autor/es | Tejera-Centeno, C.
Pérez Fernández, Pedro Arias Carrasco, José Miguel |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada III |
Fecha de publicación | 2019-09 |
Fecha de depósito | 2021-03-22 |
Publicado en |
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ISBN/ISSN | 9780735418950 0094 243X |
Resumen | A beyond mean-field study of the Tavis-Cummings (TC) model is developed. This is the simplest model for describing the interaction of a radiation field with a system composed by an array of two-level atoms. The first ... A beyond mean-field study of the Tavis-Cummings (TC) model is developed. This is the simplest model for describing the interaction of a radiation field with a system composed by an array of two-level atoms. The first correction to the mean-field ground state energy and the energy gap between the ground and the first excited states are computed. For the ground-state energy our result improves the mean-field calculation, as expected. For the gap, that cannot be calculated at mean-field level, a drop down to zero is obtained at the critical point where the system undergoes a second-order quantum phase transition. |
Cita | Tejera-Centeno, C., Pérez Fernández, P. y Arias Carrasco, J.M. (2019). A beyond mean-field study of the Tavis- Cummings model. En Symmetries and Order: Algebraic Methods in Many Body Systems New Haven, United States: American Institute of Physics. AIP Conference Proceedings 2150, 040001-1–040001-6 |
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