The radical pair model for avian magnetoreception has been significantly efficacious in explaining the magnetosensitive behavior of chemical compass . In this model, we have a multi-spin system evolving under a specific Hamiltonian assisted by neurological spin-dependent recombination channels which give an elegant compass action that many species are belived to be using . In this study, we analyze the radical pair model form a microscopic spin transitional point of view and establish the role of nuclear and environmental decoherence in radical pair spin dynamics. We identify the spin interplay between singlet state and three triplet states of radical due to Zeeman and hyperfine and examine the distinctive roles of nuclear and environmental decoherence from this perspective. Additionally, we revisit some of the earlier results concerning radical pair model from this fresh outlook and provide more comprehensive explanation to those. The approach is aimed to equip us more for solid state emulation of avian compass and design long coherehce time physical systems .
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 the distinctive effects of nuclear and environmental decoherence on it. Using a quantum information theoretic quantifier of coherence, we find that nuclear decoherence induces new structure in the spin dynamics without materially affecting the compass action; environmental decoherence, on the other hand, completely disrupts it .
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for avian magnetoreception has been significantly efficacious in explaining the magnetosensitive behavior of chemical compass . In this model, we have a multi-spin system evolving under a specific Hamiltonian assisted by neurological spin-dependent recombination channels which give an elegant compass action that many species are belived to be using
has been successful in explaining behavioral characteristics of the geomagnetic compass believed to underlie the navigation capability of certain avian species
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we analyze the
the spin dynamics of the
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form a microscopic spin transitional
and decoherence therein are interpreted from a microscopic state transition
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and establish the role of nuclear and environmental decoherence in radical pair spin dynamics. We identify the spin interplay between singlet state and three triplet states of radical due to Zeeman and hyperfine and examine the distinctive roles
. This helps to elucidate the interplay between the hyperfine and Zeeman interactions that enables the avian compass, and the distinctive effects
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from this perspective. Additionally, we revisit some of the earlier results concerning radical pair model from this fresh outlook and provide more comprehensive explanation to those. The approach is aimed to equip us more for solid state emulation of avian compass and design long coherehce time physical systems
on it. Using a quantum information theoretic quantifier of coherence, we find that nuclear decoherence induces new structure in the spin dynamics without materially affecting the compass action; environmental decoherence, on the other hand, completely disrupts it