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Phys. Rev. E 78, 025206(R) (2008) [4 pages]

Scaling law and stability for a noisy quantum system

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Mark Sadgrove1, Sandro Wimberger2, Scott Parkins3, and Rainer Leonhardt3
1CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
2Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany
3Physics Department, The University of Auckland, Private Bag 92019, Auckland, New Zealand

Received 16 May 2008; published 27 August 2008

We show that a scaling law exists for the near-resonant dynamics of cold kicked atoms in the presence of a randomly fluctuating pulse amplitude. Analysis of a quasiclassical phase-space representation of the quantum system with noise allows a new scaling law to be deduced. The scaling law and associated stability are confirmed by comparison with quantum simulations and experimental data.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.78.025206
DOI:
10.1103/PhysRevE.78.025206
PACS:
05.45.Mt, 03.65.Yz, 05.60.Gg