Driven spin dynamics enhances cryptochrome magnetoreception: Towards live quantum sensing

• URL: http://arxiv.org/abs/2206.07355v1
• Date: Wed, 15 Jun 2022 08:06:33 GMT
• Title: Driven spin dynamics enhances cryptochrome magnetoreception: Towards live quantum sensing
• Authors: Luke D. Smith, Farhan T. Chowdhury, Iona Peasgood, Nahnsu Dawkins, Daniel R. Kattnig
• Abstract summary: We show that a "live" harmonically driven magnetoreceptor can be more sensitive than its "dead" static counterpart. Findings suggest that a "live" harmonically driven magnetoreceptor can be more sensitive than its "dead" static counterpart.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The mechanism underlying magnetoreception has long eluded explanation. A popular hypothesis attributes this sense to the quantum coherent spin dynamics of spin-selective recombination reactions of radical pairs in the protein cryptochrome. However, concerns about the validity of the hypothesis have been raised as unavoidable inter-radical interactions, such as strong electron-electron dipolar coupling, appear to suppress its sensitivity. We demonstrate that this can be overcome by driving the spin system through a modulation of the inter-radical distance. It is shown that this dynamical process markedly enhances geomagnetic field sensitivity in strongly coupled radical pairs via a Landau-Zener type transition between singlet and triplet states. These findings suggest that a "live" harmonically driven magnetoreceptor can be more sensitive than its "dead" static counterpart.

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