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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8632
Title: State transitions and decoherence in the avian compass
Authors: Poonia, Vishvendra Singh
Saha D.
Ganguly S.
Published in: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Abstract: The radical pair model has been successful in explaining behavioral characteristics of the geomagnetic compass believed to underlie the navigation capability of certain avian species. In this study, the spin dynamics of the radical pair model and decoherence therein are interpreted from a microscopic state transition point of view. This helps to elucidate the interplay between the hyperfine and Zeeman interactions that enables the avian compass and clarify the distinctive effects of nuclear and environmental decoherence on it. Three regimes have been identified for the strength of the hyperfine interaction with respect to that of the geomagnetic Zeeman. It is found that the compass is likely to function in the large hyperfine interaction regime. Using a quantum information theoretic quantifier of coherence, we find that nuclear decoherence induces new structure in the spin dynamics for intermediate hyperfine interaction strength. On the other hand, environmental decoherence - modeled by two different noise models - seems to disrupt the compass action. © 2015 American Physical Society.
Citation: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics (2015), 91(5): -
URI: https://doi.org/10.1103/PhysRevE.91.052709
http://repository.iitr.ac.in/handle/123456789/8632
Issue Date: 2015
Publisher: American Physical Society
ISSN: 15393755
Author Scopus IDs: 56674806200
8601668100
7102863075
Author Affiliations: Poonia, V.S., Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
Saha, D., Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
Ganguly, S., Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
Appears in Collections:Journal Publications [ECE]

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