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Abstract:

We calculate the geometric phase of a bipartite two-level system coupled to an external environment. We analyze the reduced density matrix for an arbitrary initial state of the composite system and compute the correction to the unitary geometric phase through a kinematic approach. In all cases considered, we observe a similar structure as a function of the degree of the entanglement of the initial state. Further, we compute the entanglement entropy and concurrence of the bipartite state and analyze if there is any relation among these quantities and the geometric phase acquired during the nonunitary system's evolution. Finally, we discuss the results obtained. © 2010 The American Physical Society.

Registro:

Documento: Artículo
Título:Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties
Autor:Lombardo, F.C.; Villar, P.I.
Filiación:Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina
Computer Applications on Science and Engineering Department, Barcelona Supercomputing Center (BSC), 29 Jordi Girona, E-08034 Barcelona, Spain
Palabras clave:Bipartite state; Composite systems; Entanglement entropy; Entanglement properties; External environments; Geometric phase; Initial state; Reduced-density matrix; Two-level system
Año:2010
Volumen:81
Número:2
DOI: http://dx.doi.org/10.1103/PhysRevA.81.022115
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_v81_n2_p_Lombardo

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Citas:

---------- APA ----------
Lombardo, F.C. & Villar, P.I. (2010) . Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties. Physical Review A - Atomic, Molecular, and Optical Physics, 81(2).
http://dx.doi.org/10.1103/PhysRevA.81.022115
---------- CHICAGO ----------
Lombardo, F.C., Villar, P.I. "Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties" . Physical Review A - Atomic, Molecular, and Optical Physics 81, no. 2 (2010).
http://dx.doi.org/10.1103/PhysRevA.81.022115
---------- MLA ----------
Lombardo, F.C., Villar, P.I. "Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 81, no. 2, 2010.
http://dx.doi.org/10.1103/PhysRevA.81.022115
---------- VANCOUVER ----------
Lombardo, F.C., Villar, P.I. Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties. Phys Rev A. 2010;81(2).
http://dx.doi.org/10.1103/PhysRevA.81.022115