Dissipative dynamics of magnons under the influence of thermal environment: Bunched, antibunched and coherent magnons

Abstract

We consider a system consisting of magnons in an isotropic ferromagnet interacting with a thermal reservoir and proceed to investigate the dissipative dynamics of the magnons under various physical conditions. We show how bunched, antibunched and coherent magnons can be realized by manipulating the thermal reservoir, a driving field as well as the initial state of the system. Our results show that when the system is initiated with the thermal state, the magnons do not obtain nonclassical properties, while for Schrödinger cat states, the magnons acquire nonclassical characteristics. Besides, the magnon blockade phenomenon is observed after the onset of interaction especially when the system is initialized with the nonclassical states, i.e., the odd Schrödinger cat state. However, the classical magnons prevail in the steady state regime. This work provides theoretical support for the realization of quantum–classical transitions in real magnonic systems and may be fruitful for designing the single-magnon sources.