Tuning quantum measurements to control chaos

Environment-induced decoherence has long been recognised as being of crucial importance in the study of chaos in quantum systems. In particular, the exact form and strength of the system-environment interaction play a major role in the quantum-to-classical transition of chaotic systems. In this work...

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Bibliographic Details
Published in:Scientific reports 2017-03, Vol.7 (1), p.44684, Article 44684
Main Authors: Eastman, Jessica K., Hope, Joseph J., Carvalho, André R. R.
Format: Article
Language:English
Subjects:
639/766/483/1139
639/766/530
Chaos theory
Humanities and Social Sciences
multidisciplinary
Nonlinear systems
Science
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Summary:Environment-induced decoherence has long been recognised as being of crucial importance in the study of chaos in quantum systems. In particular, the exact form and strength of the system-environment interaction play a major role in the quantum-to-classical transition of chaotic systems. In this work we focus on the effect of varying monitoring strategies, i.e. for a given decoherence model and a fixed environmental coupling, there is still freedom on how to monitor a quantum system. We show here that there is a region between the deep quantum regime and the classical limit where the choice of the monitoring parameter allows one to control the complex behaviour of the system, leading to either the emergence or suppression of chaos. Our work shows that this is a result from the interplay between quantum interference effects induced by the nonlinear dynamics and the effectiveness of the decoherence for different measurement schemes.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep44684