Energy cooperation in quantum thermoelectric systems with multiple electric currents

Liu Yefeng¹, Lu Jincheng^{1, †}, Wang Rongqian¹, Wang Chen², Jiang Jian-Hua^{1, ‡}

Comparisons of the optimal performances between the four-terminal and three-terminal heat engines for various QD energies E₃ and E₄. (a) The maximum efficiency, (b) the efficiency at the maximum output power, (c) the maximum output power, and (d) the output power at the maximum efficiency. The other parameters are t = −0.2k_BT, μ = 0, E₁ = 1.0k_BT, and E₂ = 2.0k_BT.