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Cucchietti, F.M.; Paz, J.P.; Zurek, W.H. "Decoherence from spin environments" (2005) Physical Review A - Atomic, Molecular, and Optical Physics. 72(5)
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Abstract:

We examine two exactly solvable models of decoherence-a central spin-system, (i) with and (ii) without a self-Hamiltonian, interacting with a collection of environment spins. In the absence of a self-Hamiltonian we show that in this model (introduced some time ago to illustrate environment-induced superselection) generic assumptions about the coupling strengths can lead to a universal (Gaussian) suppression of coherence between pointer states. On the other hand, we show that when the dynamics of the central spin is dominant a different regime emerges, which is characterized by a non-Gaussian decay and a dramatically different set of pointer states. We explore the regimes of validity of the Gaussian decay and discuss its relation to the spectral features of the environment and to the Loschmidt echo (or fidelity). © 2005 The American Physical Society.

Registro:

Documento: Artículo
Título:Decoherence from spin environments
Autor:Cucchietti, F.M.; Paz, J.P.; Zurek, W.H.
Filiación:Theoretical Division, Los Alamos National Laboratory, MS B213, Los Alamos, NM 87545, United States
Departmento de Física, FCEyN, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Gaussian decay; Pointer states; Spectral features; Acoustic wave propagation; Gaussian noise (electronic); High energy physics; Hamiltonians
Año:2005
Volumen:72
Número:5
DOI: http://dx.doi.org/10.1103/PhysRevA.72.052113
Título revista:Physical Review A - Atomic, Molecular, and Optical Physics
Título revista abreviado:Phys Rev A
ISSN:10502947
CODEN:PLRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n5_p_Cucchietti

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Citas:

---------- APA ----------
Cucchietti, F.M., Paz, J.P. & Zurek, W.H. (2005) . Decoherence from spin environments. Physical Review A - Atomic, Molecular, and Optical Physics, 72(5).
http://dx.doi.org/10.1103/PhysRevA.72.052113
---------- CHICAGO ----------
Cucchietti, F.M., Paz, J.P., Zurek, W.H. "Decoherence from spin environments" . Physical Review A - Atomic, Molecular, and Optical Physics 72, no. 5 (2005).
http://dx.doi.org/10.1103/PhysRevA.72.052113
---------- MLA ----------
Cucchietti, F.M., Paz, J.P., Zurek, W.H. "Decoherence from spin environments" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 72, no. 5, 2005.
http://dx.doi.org/10.1103/PhysRevA.72.052113
---------- VANCOUVER ----------
Cucchietti, F.M., Paz, J.P., Zurek, W.H. Decoherence from spin environments. Phys Rev A. 2005;72(5).
http://dx.doi.org/10.1103/PhysRevA.72.052113