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Decoherence and quantum quench: Their relationship with excited state quantum phase transitions

 

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Author: García Ramos, José Enrique
Arias Carrasco, José Miguel
Cejnar, Pavel
Dukelsky, Jorge
Pérez Fernández, Pedro
Relaño, Armando
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2012
Published in: Beauty in Physics: Theory and Experiment - In Honor of Francesco Iachello on the Occasion of His 70th Birthday (2012), p 309-317
ISBN/ISSN: 978-073541100-5
0094-243X
1551-7616
Document type: Presentation
Abstract: We study the similarities and differences between the phenomena of Quantum Decoherence and Quantum Quench in presence of an Excited State Quantum Phase Transition (ESQPT). We analyze, on one hand, the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics and, on the other, we treat the quantum relaxation process that follows an abrupt quench in the control parameter of the system Hamiltonian. We explore how the Quantum Decoherence and the quantum relaxation process are affected by the presence of an ESQPT. We conclude that the dynamics of the qubit or the quantum relaxation process change dramatically when the system passes through a continuous ESQPT.
Cite: García Ramos, J.E., Arias Carrasco, J.M., Cejnar, P., Dukelsky, J., Pérez Fernández, P. y Relaño, A. (2012). Decoherence and quantum quench: Their relationship with excited state quantum phase transitions. En Beauty in Physics: Theory and Experiment - In Honor of Francesco Iachello on the Occasion of His 70th Birthday (309-317), Hacienda Cocoyoc; Mexico: American Institute of Physics.
Size: 784.8Kb
Format: PDF

URI: https://hdl.handle.net/11441/84538

DOI: 10.1063/1.4759412

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