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Abstract:

We study the differences between the processes of decoherence induced by chaotic and regular environments. For this we analyze a family of simple models that contain both regular and chaotic environments. In all cases the system of interest is a "quantum walker," i.e., a quantum particle that can move on a lattice with a finite number of sites. The walker interacts with an environment which has a D -dimensional Hilbert space. The results we obtain suggest that regular and chaotic environments are not distinguishable from each other in a (short) time scale t*, which scales with the dimensionality of the environment as t* log2 (D). However, chaotic environments continue to be effective over exponentially longer time scales while regular environments tend to reach saturation much sooner. We present both numerical and analytical results supporting this conclusion. The family of chaotic evolutions we consider includes the so-called quantum multibaker map as a particular case. © 2006 The American Physical Society.

Registro:

Documento: Artículo
Título:Decoherence induced by a chaotic enviroment: A quantum walker with a complex coin
Autor:Ermann, L.; Paz, J.P.; Saraceno, M.
Filiación:Departamento de Física, Comisión Nacional de Energía Atómica, Ave. del Libertador 8250 (C1429BNP), Buenos Aires, Argentina
Departamento de Física, FCEyN, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Theoretical Division, LANL, MSB213, Los Alamos, NM 87545, United States
Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Villa Ballester, Alem 3901 (B1653HIM), Argentina
Palabras clave:Chaos theory; Coherent light; Mathematical models; Decoherence; Quantum walker; Quantum theory
Año:2006
Volumen:73
Número:1
DOI: http://dx.doi.org/10.1103/PhysRevA.73.012302
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_v73_n1_p_Ermann

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Citas:

---------- APA ----------
Ermann, L., Paz, J.P. & Saraceno, M. (2006) . Decoherence induced by a chaotic enviroment: A quantum walker with a complex coin. Physical Review A - Atomic, Molecular, and Optical Physics, 73(1).
http://dx.doi.org/10.1103/PhysRevA.73.012302
---------- CHICAGO ----------
Ermann, L., Paz, J.P., Saraceno, M. "Decoherence induced by a chaotic enviroment: A quantum walker with a complex coin" . Physical Review A - Atomic, Molecular, and Optical Physics 73, no. 1 (2006).
http://dx.doi.org/10.1103/PhysRevA.73.012302
---------- MLA ----------
Ermann, L., Paz, J.P., Saraceno, M. "Decoherence induced by a chaotic enviroment: A quantum walker with a complex coin" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 73, no. 1, 2006.
http://dx.doi.org/10.1103/PhysRevA.73.012302
---------- VANCOUVER ----------
Ermann, L., Paz, J.P., Saraceno, M. Decoherence induced by a chaotic enviroment: A quantum walker with a complex coin. Phys Rev A. 2006;73(1).
http://dx.doi.org/10.1103/PhysRevA.73.012302