Chiral-induced spin selectivity augments quantum coherence in avian compass

TL;DR

This paper explores how chiral-induced spin selectivity enhances quantum coherence in avian magnetoreception, showing that higher CISS correlates with increased global coherence and improved compass sensitivity.

Contribution

It demonstrates the role of CISS in augmenting quantum coherence and its utilitarian impact on the avian compass mechanism, including effects of interactions and decoherence.

Findings

CISS increases both global and local coherence in radical pairs.

Global coherence correlates with signaling state yield and compass sensitivity.

High CISS enhances the role of coherence in avian magnetoreception.

Abstract

This work investigates the effect of chiral-induced spin selectivity (CISS) on quantum spin coherence in the radical pair mechanism of avian magnetoreception. Additionally, we examine the utilitarian role of coherence for the avian compass by analyzing its correlation with the yield of the signaling state. We find that both the relative entropy of global coherence and local coherence in the radical pair increases with CISS. However, only global coherence exhibit the utilitarian role for the avian compass. We also analyze the interplay of dipolar interaction with the CISS and their effect on the coherence of the radical pair. Further, we analyze the effect of environmental decoherence along with CISS. We conclude that a high CISS results in a high correlation of global coherence with signaling state yield. It confirms that CISS plays an important role both for compass sensitivity and coherence in the avian compass.