Thermal Transistor Effect in Quantum Systems

We study a quantum system composed of three interacting qubits, each coupled to different thermal reservoir. show how engineer it build device analogous an electronic bipolar transistor. outline the interaction among qubits plays crucial role for appearance effect, also linking characteristics system-bath interactions that govern decoherence and dissipation mechanisms system. By comparison with previous proposals, our model extends regime parameters where transistor effect occurs, being more robust respect small variations coupling parameters. Moreover, appears be realistic directly connected in terms potential implementations feasible setups domain spin chains, such as molecular nanomagnets.