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Abstract:

We compute the geometric phase for a spin-1/2 particle under the presence of a composite environment, composed of an external bath (modeled by an infinite set of harmonic oscillators) and another spin-1/2 particle. We consider both cases: an initial entanglement between the spin-1/2 particles and an initial product state in order to see if the initial entanglement has an enhancement effect on the geometric phase of one of the spins. We follow the nonunitary evolution of the reduced density matrix and evaluate the geometric phase for a single two-level system. We also show that the initial entanglement enhances the sturdiness of the geometric phase under the presence of an external composite environment. © 2011 American Physical Society.

Registro:

Documento: Artículo
Título:Geometric phases in the presence of a composite environment
Autor:Villar, P.I.; Lombardo, F.C.
Filiación:Departamento de Física Juan José Giambiagi, FCEyN UBA, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Composite environment; Enhancement effects; Geometric phase; Geometric phasis; Harmonic oscillators; Reduced-density matrix; Two-level system; Quantum entanglement; Geometry
Año:2011
Volumen:83
Número:5
DOI: http://dx.doi.org/10.1103/PhysRevA.83.052121
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_v83_n5_p_Villar

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Citas:

---------- APA ----------
Villar, P.I. & Lombardo, F.C. (2011) . Geometric phases in the presence of a composite environment. Physical Review A - Atomic, Molecular, and Optical Physics, 83(5).
http://dx.doi.org/10.1103/PhysRevA.83.052121
---------- CHICAGO ----------
Villar, P.I., Lombardo, F.C. "Geometric phases in the presence of a composite environment" . Physical Review A - Atomic, Molecular, and Optical Physics 83, no. 5 (2011).
http://dx.doi.org/10.1103/PhysRevA.83.052121
---------- MLA ----------
Villar, P.I., Lombardo, F.C. "Geometric phases in the presence of a composite environment" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 83, no. 5, 2011.
http://dx.doi.org/10.1103/PhysRevA.83.052121
---------- VANCOUVER ----------
Villar, P.I., Lombardo, F.C. Geometric phases in the presence of a composite environment. Phys Rev A. 2011;83(5).
http://dx.doi.org/10.1103/PhysRevA.83.052121