Magnetically controlled quantum thermal devices via three nearest-neighbor coupled spin-1/2 systems

• DOI: 10.48550/arxiv.2401.04315
• Publication Date: 2024-01-01
• Authors: Yi‐jia Yang; Yu‐qiang Liu; Zheng Liu; Chang-shui Yu
• Keywords: Heat current

A quantum thermal device based on three nearest-neighbor coupled spin-1/2 systems controlled by the magnetic field is proposed. We systematically study steady-state behaviors of system. When two terminals our system are in contact with reservoirs, respectively, behaves as a perfect modulator that can manipulate heat current from zero to specific values adjusting direction over different parameter ranges, since longitudinal completely block transport. Significantly, also be achieved when third reservoir perturbs middle spin. find transverse induce separate into subspaces which neither vanishes, thus providing an extra level control through manipulation initial state. In addition, performance this transistor enhanced controlling field, achieving versatile amplification behaviors, particular substantial factors.