Many-particle radiative heat transfer in a nonreciprocal graphene plasmonic cavity

Due to the presence of many-body interactions, strong enhancement effects of heat flux and rich thermophysical phenomena are possible. In this work, we build a many-particle radiative heat transfer model inside a cavity consisting of two graphene sheets. By introducing an additional particle and the graphene cavity in the near field, the heat transfer between two particles is discussed. We show that the mutual interactions greatly enhance the heat exchange and observe an interference fringe pattern. Moreover, the nonreciprocal plasmons on the drift-biased graphene provide a rotational degree of freedom to control the heat transfer and can be used to effectively rectify the thermal energy. Our findings extend recent progress in understanding and tailoring energy exchange in the many-body systems.