Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 13: Transport: Poster Session
TT 13.41: Poster
Montag, 26. März 2012, 15:00–19:00, Poster B
Full Counting Statistics applied to dissipative Cooper Pair Pumps — •Philip Wollfarth1, Ingo Kamleitner1, and Alexander Shnirman1,2 — 1Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany — 2DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
We investigate geometric charge pumping in superconducting
Josephson devices [1,2] using the method of Full Counting Statistics [3]. In previous studies the expectation value of the current operator was calculated and a very delicate handling of the dissipative master
equation [4] governing the dynamics of the system was required. E.g., the rotating wave (secular) approximation turned out to be non-charge-conserving [5]. We include the counting field (charge measuring device) into the master equation and investigate the influence of voltage fluctuation on the pumping process.
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