Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties

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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 consi...

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Autor principal: Lombardo, Fernando César
Otros Autores: Villar, P.I
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2010
Acceso en línea:Registro en Scopus
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100 1 |a Lombardo, Fernando César 
245 1 0 |a Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties 
260 |c 2010 
270 1 0 |m Lombardo, F. C.; Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina; email: lombardo@df.uba.ar 
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506 |2 openaire  |e Política editorial 
520 3 |a 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.  |l eng 
593 |a Departamento de Física Juan José Giambiagi, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina 
593 |a Computer Applications on Science and Engineering Department, Barcelona Supercomputing Center (BSC), 29 Jordi Girona, E-08034 Barcelona, Spain 
690 1 0 |a BIPARTITE STATE 
690 1 0 |a COMPOSITE SYSTEMS 
690 1 0 |a ENTANGLEMENT ENTROPY 
690 1 0 |a ENTANGLEMENT PROPERTIES 
690 1 0 |a EXTERNAL ENVIRONMENTS 
690 1 0 |a GEOMETRIC PHASE 
690 1 0 |a INITIAL STATE 
690 1 0 |a REDUCED-DENSITY MATRIX 
690 1 0 |a TWO-LEVEL SYSTEM 
700 1 |a Villar, P.I. 
773 0 |d 2010  |g v. 81  |k n. 2  |p Phys Rev A  |x 10502947  |t Physical Review A - Atomic, Molecular, and Optical Physics 
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