The device consists of a quantum dot (QD), represented by the symbol ε1. The QD is located between two metallic leads at different temperatures, which allows thermal energy to flow across the QD. A quasi-one-dimensional, u-shaped superconducting wire is connected to the QD. The Kitaev wire, as it is called, has two majoranas (η1 and η2) at its edges. The majoranas emerge as excitations characterized by zero-energy modes.