VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013


 Nanophysics: from fundamentals to applications

(the return)


Tuesday 6
Poster Session

› 21:00 - 23:00 (2h)
Quantum current noise from a Born-Markov master equation
Peter Kirton  1@  , Andrew Armour  1@  , Manuel Houzet  2@  , Fabio Pistolesi  3@  
1 : School of Physics and Astronomy  -  Website
Nottingham, NG7 2RD, United Kingdom -  United Kingdom
2 : Service de Physique Statistique, Magnétisme et Supraconductivité  (SPSMS)  -  Website
17 rue des Martyrs 38054 Grenoble Cedex 9 -  France
3 : Laboratoire Ondes et Matière d'Aquitaine  (LOMA)  -  Website
CNRS : UMR5798
Bât. A4 Recherche Physique 351, Cours de la Libération 33405 TALENCE CEDEX -  France

We present a formalism for calculating the non-symmetrized quantum current noise within the Born-Markov approximation for the master equation. The formalism is particularly well suited to obtaining the current noise for quantum transport in mesoscopic devices such as a superconducting single electron transistor (SSET). As an example of the method, we obtain explicit results for the double Josephson-quasiparticle (DJQP) resonance in a SSET. Our calculations reveal the asymmetries that develop in the current noise as well as clarifying the behavior at high frequencies. Our findings are consistent with recent measurements of the asymmetry in the current noise spectrum.

Reference: P. G. Kirton, A. D. Armour, M. Houzet, F. Pistolesi, Phys. Rev. B (Rapid) 86, 08135 (2012) 10.1103/PhysRevB.86.081305

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