Decoherence and Noise in Loschmidt Echo Experiments

• Authors: R. Alicki , W. Miklaszewski , M. Pogorzelska
• Languages of publication: EN

Abstracts

EN

We discuss some recent results concerning the decoherence in controlled quantum open systems within the mathematical setting corresponding to motion reversal experiments (the Loschmidt echo). We compare the case of randomly chosen sequence of unitary dynamical maps with the case of a constant dynamics corresponding to a classically chaotic evolution. The interplay between chaos and decoherence is illustrated by the new numerical results on the quantum Arnold cat map perturbed by a measurement process. Open problems related to the simple operational characterization of the decoherence strength are discussed.

Keywords

EN

03.65.Yz

Discipline

• 03.65.Yz: Decoherence; open systems; quantum statistical methods(see also 03.67.Pp in quantum information; for decoherence in Bose-Einstein condensates, see 03.75.Gg)

• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 1
• Pages: 121-129

Dates

published

2006-01

received

2005-05-19

Contributors

author

R. Alicki

• Institute of Theoretical Physics and Astrophysics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland

author

W. Miklaszewski

• Institute of Theoretical Physics and Astrophysics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland

author

M. Pogorzelska

• Institute of Theoretical Physics and Astrophysics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland

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Identifiers

DOI

10.12693/APhysPolA.109.121