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Wisniacki, D.A.; Roncaglia, A.J. "Sensitivity to perturbations and quantum phase transitions" (2013) Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 87(5)
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Abstract:

The local density of states or its Fourier transform, usually called fidelity amplitude, are important measures of quantum irreversibility due to imperfect evolution. In this Rapid Communication we study both quantities in a paradigmatic many body system, the Dicke Hamiltonian, where a single-mode bosonic field interacts with an ensemble of N two-level atoms. This model exhibits a quantum phase transition in the thermodynamic limit, while for finite instances the system undergoes a transition from quasi-integrability to quantum chaotic. We show that the width of the local density of states clearly points out the imprints of the transition from integrability to chaos but no trace remains of the quantum phase transition. The connection with the decay of the fidelity amplitude is also established. © 2013 American Physical Society.

Registro:

Documento: Artículo
Título:Sensitivity to perturbations and quantum phase transitions
Autor:Wisniacki, D.A.; Roncaglia, A.J.
Filiación:Departamento de Física, FCEyN, Ciudad Universitaria, Pabellón 1, 1428 Buenos Aires, Argentina
Palabras clave:Bosonic fields; Fidelity amplitude; Local density of state; Many-body systems; Quantum phase transitions; Rapid communication; Thermodynamic limits; Two-level atom; Hamiltonians; Phase transitions; Quantum theory; chemical model; chemical structure; computer simulation; phase transition; quantum theory; Computer Simulation; Models, Chemical; Models, Molecular; Phase Transition; Quantum Theory
Año:2013
Volumen:87
Número:5
DOI: http://dx.doi.org/10.1103/PhysRevE.87.050902
Título revista:Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Título revista abreviado:Phys. Rev. E Stat. Nonlinear Soft Matter Phys.
ISSN:15393755
CODEN:PLEEE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v87_n5_p_Wisniacki

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Citas:

---------- APA ----------
Wisniacki, D.A. & Roncaglia, A.J. (2013) . Sensitivity to perturbations and quantum phase transitions. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 87(5).
http://dx.doi.org/10.1103/PhysRevE.87.050902
---------- CHICAGO ----------
Wisniacki, D.A., Roncaglia, A.J. "Sensitivity to perturbations and quantum phase transitions" . Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 87, no. 5 (2013).
http://dx.doi.org/10.1103/PhysRevE.87.050902
---------- MLA ----------
Wisniacki, D.A., Roncaglia, A.J. "Sensitivity to perturbations and quantum phase transitions" . Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, vol. 87, no. 5, 2013.
http://dx.doi.org/10.1103/PhysRevE.87.050902
---------- VANCOUVER ----------
Wisniacki, D.A., Roncaglia, A.J. Sensitivity to perturbations and quantum phase transitions. Phys. Rev. E Stat. Nonlinear Soft Matter Phys. 2013;87(5).
http://dx.doi.org/10.1103/PhysRevE.87.050902