We studies magnetoreception and electron spin resonance (ESR) of molecular systems. We are mainly working on the photochemically produced radical pair systems, and are trying not only to detect the paramagnetic photochemical intermediates but also to manipulate electron spin dynamics by various magnetic transient techniques (static and pulse magnetic field, radio wave pulse, microwave pulse, AWG(arbitrary wave generator) pulse irradiation) for deep understanding of the relationship between the spin dynamics and the spin selective chemical reactions.
We progress to improve the experimental techniques for precise measurement of the magnetic field effect relatively weak magnetic field and propose novel methods to analyse the data. In parallel, theoretical calculation also progress. Spin dynamics of radical pairs are one of the most fundamental but interesting quantum mechanical dynamics. Therefore, the effect of the spin dynamics on the chemical reaction are quite remarkable example in which the quantum mechanical coherent dynamics easily appears. We are also interested in the magnetoreception of the biomolecular systems for understanding animal navigations. So far, in a hypothesis, it is considered that the quantum mechanical spin dynamics in a radical pair is an origin of the sense of the earth magnetic field. These studies are progressing in the wide spreading range from quantum physics to biology in a field so called Quantum Biology.
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