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Open Quantum Systems Decoherence

The Avian Compass can be Sensitive even without Sustained Quantum Coherence

arXiv

Authors: Rakshit Jain, Vishvendra Singh Poonia, Kasturi Saha, Dipankar Saha, Swaroop Ganguly

Year

2017

Paper ID

24543

Status

Preprint

Abstract Read

~2 min

Abstract Words

110

Citations

N/A

Abstract

Theoretical studies indicating the presence of long-lived coherence in the radical pair system have engendered questions about the utilitarian role of sustained coherence in the avian compass. In this manuscript, we investigate this for a realistic multi-nuclear radical pair system, along with the related question of its sensitivity to the geomagnetic field. Firstly, we find that sustenance of long-lived coherence is unlikely in a realistic hyperfine environment. Secondly, probing the role of the hyperfine interactions on the compass sensitivity, we establish the hyperfine anisotropy as an essential parameter for the sensitivity. Thereby, we are able to identify a parameter regime where the compass would exhibit sensitivity even without sustained coherence.

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Theoretical studies indicating the presence of long-lived coherence in the radical pair system have engendered questions about the utilitarian role of sustained coherence in...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1712.04623 [2] arXiv https://arxiv.org/abs/1712.04623 [3] Publisher https://arxiv.org/abs/1712.04623

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