Abstract:
We calculate the geometric phase for an open system (spin-boson model) which interacts with an environment (ohmic or nonohmic) at arbitrary temperature. However there have been many assumptions about the time scale at which the geometric phase can be measured, there has been no reported observation of geometric phases for mixed states under nonunitary evolution yet. We study not only how they are corrected by the presence of the different type of environments but estimate the corresponding times at which decoherence becomes effective as well. These estimations should be taken into account when planning experimental setups to study the geometric phase in the nonunitary regime, particularly important for the application of fault-tolerant quantum computation. © 2006 The American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Geometric phases in open systems: A model to study how they are corrected by decoherence |
Autor: | Lombardo, F.C.; Villar, P.I. |
Filiación: | Departamento de Física Juan José Giambiagi, FCEyN UBA, Pabellóin I, 1428 Buenos Aires, Argentina
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Palabras clave: | Fault-tolerant quantum computations; Geometric phases; Coherent light; Computation theory; Mathematical models; Numerical methods; Open systems; Phase transitions; Quantum theory; Thermal effects; Computational geometry |
Año: | 2006
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Volumen: | 74
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Número: | 4
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DOI: |
http://dx.doi.org/10.1103/PhysRevA.74.042311 |
Título revista: | Physical Review A - Atomic, Molecular, and Optical Physics
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Título revista abreviado: | Phys Rev A
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ISSN: | 10502947
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CODEN: | PLRAA
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v74_n4_p_Lombardo |
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Citas:
---------- APA ----------
Lombardo, F.C. & Villar, P.I.
(2006)
. Geometric phases in open systems: A model to study how they are corrected by decoherence. Physical Review A - Atomic, Molecular, and Optical Physics, 74(4).
http://dx.doi.org/10.1103/PhysRevA.74.042311---------- CHICAGO ----------
Lombardo, F.C., Villar, P.I.
"Geometric phases in open systems: A model to study how they are corrected by decoherence"
. Physical Review A - Atomic, Molecular, and Optical Physics 74, no. 4
(2006).
http://dx.doi.org/10.1103/PhysRevA.74.042311---------- MLA ----------
Lombardo, F.C., Villar, P.I.
"Geometric phases in open systems: A model to study how they are corrected by decoherence"
. Physical Review A - Atomic, Molecular, and Optical Physics, vol. 74, no. 4, 2006.
http://dx.doi.org/10.1103/PhysRevA.74.042311---------- VANCOUVER ----------
Lombardo, F.C., Villar, P.I. Geometric phases in open systems: A model to study how they are corrected by decoherence. Phys Rev A. 2006;74(4).
http://dx.doi.org/10.1103/PhysRevA.74.042311