Theoretical studies on correlation effects and non-equilibrium phase transitions for high density particles systems

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Through the theoretical analysis on non-equilibrium phase transitions such as jamming transitions and glass transitions for high density systems, we have developed a scaling theory for jamming transition, and clarified the existence of hysteresis on jamming for frictional grains. We have also developed a generalized mode-coupling theory for spatial-temporal correlation function for dense systems. Moreover, we have demonstrated that the fluctuation theorem can hold even for granular systems which do not have any detailed balance, and discussed the relationship with Green-Kubo formula. In addition, we have found that there is a negative restitution coefficient for collision for granular grains, and applied the concept of the jamming for some other systems.