Quantum Nernst engines
  We theoretically propose Nernst engines based on quantum Hall edge states. We identify a setup that exhibits an extreme asymmetry between the off-diagonal Onsager coefficients for heat and charge transport. In terms of thermodynamic efficiency, this engine outperforms a recently proposed classical Nernst engine. A second setup using an anti-dot is found to be more efficient as energy filtering becomes less strong. 
Bj\"orn Sothmann, Rafael S\'anchez, Andrew N. Jordan
cond-mat.mes-hall quant-ph