Ponencia
Decoherence as a Signature of an Excited State Quantum Phase Transition in Two Level Boson Systems
Autor/es | García Ramos, José Enrique
Arias Carrasco, José Miguel Dukelsky, Jorge Pérez Fernández, Pedro Relaño, Armando |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Física Aplicada III |
Fecha de publicación | 2009 |
Fecha de depósito | 2019-03-27 |
Publicado en |
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ISBN/ISSN | 978-073540702-2 0094-243X 1551-7616 |
Resumen | We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is affected by the presence of quantum phase ... We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is affected by the presence of quantum phase transitions in the environment. We conclude that the dynamics of the qubit changes dramatically when the environment passes through a continuous excited state quantum phase transition. If the system-environment coupling energy equals the energy at which the environment has a critical behavior, the decoherence induced on the qubit is maximal and the fidelity tends to zero with finite size scaling obeying a power-law. |
Identificador del proyecto | FIS2006-12783-C03-01
FPA2007-63074 FIS2008-04189 CSD2007-00042 200650M012 FQM160 FQM318 P05-FQM437 P07-FQM-02962 |
Cita | García Ramos, J.E., Arias Carrasco, J.M., Dukelsky, J., Pérez Fernández, P. y Relaño, A. (2009). Decoherence as a Signature of an Excited State Quantum Phase Transition in Two Level Boson Systems. En International Conference on Nuclear Structure and Dynamics '09 (207-210), Dubrovnik; Croatia: American Institute of Physics. |
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