corner
corner

Phys. Rev. Lett. 105, 030401 (2010) [4 pages]

Decoherence in Adiabatic Quantum Evolution: Application to Cooper Pair Pumping

Download: PDF (218 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. P. Pekola1, V. Brosco2,3,8, M. Möttönen1,4,7, P. Solinas4, and A. Shnirman5,6
1Low Temperature Laboratory, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland
2Dipartimento di Fisica, Universita’ di Roma “La Sapienza,” Piazzale A. Moro, 2 00185 Roma, Italy
3Institut für Theoretische Festkörperphysik, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
8ISC-CNR, Via dei Taurini, 19 00185 Roma, Italy
4Department of Applied Physics/COMP, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland
7Australian Research Council Centre of Excellence for Quantum Computer Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia
5Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
6DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany

Received 19 November 2009; revised 3 May 2010; published 12 July 2010

One of the challenges of adiabatic control theory is the proper inclusion of the effects of dissipation. Here we study the adiabatic dynamics of an open two-level quantum system deriving a generalized master equation to consistently account for the combined action of the driving and dissipation. We demonstrate that in the zero-temperature limit the ground state dynamics is not affected by environment. As an example, we apply our theory to Cooper pair pumping, which demonstrates the robustness of ground state adiabatic evolution.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.030401
DOI:
10.1103/PhysRevLett.105.030401
PACS:
05.30.-d, 03.65.Vf, 03.65.Yz, 85.25.Cp