Función de Wigner y Decoherencia Cuántica para Sistemas Átomo-Campo en Cavidades QED

ABSTRACT: The processes of quantum decoherence in QED cavities have been extensively studied in the last decade, both experimentally by Haroche, Raimond et. al., as theoretically by Nemes, Davidovich et. to the. We present here the dynamics of the Wigner function for a system consisting of a two-level atom and a cavity in a dissipative environment, using a numerical integration scheme that allows us to consider initial Squeezed and Schrodinger's Cat States. The interaction between the atom and the single-mode field is considered by a dispersive model, that is, the interaction in the Hamiltonian of Jaynes-Cummings appears as a small disturbance. The interest is focused both on the quantum characteristics of the dispersive approach (preparation of mesoscopic states) and on the aspects that characterize dynamics and dissipation. In particular, the gradual loss of quantum coherence is observed through the use of the Wigner function, where the disappearance of the interference regions of the initial quantum states is evidenced.

• Autores: Restrepo Cuartas, Juan Pablo; Vinck Posada, Herbert; Rodríguez Rey, Boris Ánghelo
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2009
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/13340
• Acceso en línea: http://hdl.handle.net/10495/13340
• Palabra clave: Decoherencia; Ecuación Maestra; Estados Gato; Funcion de Wigner; Decoherence; Schrodinger’s Cat States
• Rights: openAccess
• License: Atribución 2.5 Colombia (CC BY 2.5 CO)