KIRTON, P. G.; ARMOUR, A. D.; HOUZET, M.; PISTOLESI, Fabio

doi:10.1103/PhysRevB.86.081305

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Licencia de uso del documento

KIRTON, P. G.
School of Physics and Astronomy [Nottingham]

ARMOUR, A. D.
School of Physics and Astronomy [Nottingham]

HOUZET, M.
Service de Physique Statistique, Magnétisme et Supraconductivité [SPSMS - UMR 9001]

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Article de revue

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Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2012, vol. 86, n° 8, p. 081305

American Physical Society

Resumen en inglés

Quantum coherent oscillations in the electric charge passing through a mesoscopic conductor can give rise to a current noise spectrum which is strongly asymmetric in frequency. The asymmetry reveals the fundamental difference between quantum and classical fluctuations in the current. We show how the quantum current noise can be obtained starting from a Born-Markov master equation, an approach which is applicable to a wide class of systems. Our method enables us to analyze the rich behavior of the current noise associated with the double Josephson quasiparticle resonance in a superconducting single-electron transistor (SSET). The asymmetric part of the noise is found to be strongly dependent on the choice of operating point for the SSET and can be either positive or negative. Our results are in good agreement with recent measurements.< Leer menos

Palabras clave en inglés

Noise processes and phenomena

Quantum fluctuations - quantum noise and quantum jumps

Superconducting devices

DOI

http://dx.doi.org/10.1103/PhysRevB.86.081305

Proyecto ANR

Lois générales pour la supraconductivité mésoscopique en régime hors d'équilibre non-stationnaire - ANR-11-JS04-0003
Nano Mécanique Quantique - ANR-10-BLAN-0404

Orígen

Importado de Hal

Centros de investigación

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798