Artículo
Entropies and IPR as Markers for a Phase Transition in a Two-Level Model for Atom–Diatomic Molecule Coexistence
Autor/es | Baena, Ignacio
Pérez Fernández, Pedro Rodríguez Gallardo, Manuela Arias Carrasco, José Miguel |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Física Aplicada III |
Fecha de publicación | 2022 |
Fecha de depósito | 2022-03-22 |
Publicado en |
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Resumen | A quantum phase transition (QPT) in a simple model that describes the coexistence of atoms and diatomic molecules is studied. The model, which is briefly discussed, presents a second-order ground state phase transition in ... A quantum phase transition (QPT) in a simple model that describes the coexistence of atoms and diatomic molecules is studied. The model, which is briefly discussed, presents a second-order ground state phase transition in the thermodynamic (or large particle number) limit, changing from a molecular condensate in one phase to an equilibrium of diatomic molecules–atoms in coexistence in the other one. The usual markers for this phase transition are the ground state energy and the expected value of the number of atoms (alternatively, the number of molecules) in the ground state. In this work, other markers for the QPT, such as the inverse participation ratio (IPR), and particularly, the Rényi entropy, are analyzed and proposed as QPT markers. Both magnitudes present abrupt changes at the critical point of the QPT. |
Identificador del proyecto | PID2019-104002GB-C22
PID2020-114687GB-I00 10.13039/501100011033 US-1380840 P20_01247 |
Cita | Baena, I., Pérez Fernández, P., Rodríguez Gallardo, M. y Arias Carrasco, J.M. (2022). Entropies and IPR as Markers for a Phase Transition in a Two-Level Model for Atom–Diatomic Molecule Coexistence. Entropy, 24 (1), 113. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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Entropies and IPR as Markers.pdf | 378.6Kb | [PDF] | Ver/ | |