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Abstract:

We present a quantum open-system approach to analyze the nonunitary dynamics of a superconducting qubit when it evolves under the influence of external noise. We consider the presence of longitudinal and transverse environmental fluctuations affecting the system's dynamics and model these fluctuations by defining their correlation function in time. By using a Gaussian-like noise correlation, we can study low- and high-frequency noise contribution to decoherence and implement our results in the computation of geometric phases in open quantum systems. We numerically study when the accumulated phase of a solid-state qubit can still be found close to the unitary (Berry) one. Our results can be used to explain experimental measurements of the Berry phase under high-frequency fluctuations and design experimental future setups when manipulating superconducting qubits. © 2014 American Physical Society.

Registro:

Documento: Artículo
Título:Corrections to the Berry phase in a solid-state qubit due to low-frequency noise
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
Palabras clave:Correlation function; Environmental fluctuations; High frequency HF; High-frequency noise; Low-Frequency Noise; Noise correlation; Open quantum systems; Superconducting qubits; Quantum computers; Quantum electronics; Quantum optics; Solid state physics; Superconductivity; Fruits
Año:2014
Volumen:89
Número:1
DOI: http://dx.doi.org/10.1103/PhysRevA.89.012110
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_v89_n1_p_Lombardo

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Citas:

---------- APA ----------
Lombardo, F.C. & Villar, P.I. (2014) . Corrections to the Berry phase in a solid-state qubit due to low-frequency noise. Physical Review A - Atomic, Molecular, and Optical Physics, 89(1).
http://dx.doi.org/10.1103/PhysRevA.89.012110
---------- CHICAGO ----------
Lombardo, F.C., Villar, P.I. "Corrections to the Berry phase in a solid-state qubit due to low-frequency noise" . Physical Review A - Atomic, Molecular, and Optical Physics 89, no. 1 (2014).
http://dx.doi.org/10.1103/PhysRevA.89.012110
---------- MLA ----------
Lombardo, F.C., Villar, P.I. "Corrections to the Berry phase in a solid-state qubit due to low-frequency noise" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 89, no. 1, 2014.
http://dx.doi.org/10.1103/PhysRevA.89.012110
---------- VANCOUVER ----------
Lombardo, F.C., Villar, P.I. Corrections to the Berry phase in a solid-state qubit due to low-frequency noise. Phys Rev A. 2014;89(1).
http://dx.doi.org/10.1103/PhysRevA.89.012110