Leo Szilard pointed out that Maxwell's demon can be replaced by machinery, thereby laying the foundation for understanding physical nature of information. Szilard's information engine still serves as a canonical example after almost hundred years, despite recent significant growth area. The role plays reduced to mapping observable data meta-stable memory, which is utilized extract work. While s...

Two different diagnostic-based schemes to determine the performance of quantum Otto engines are compared; their stark differences demonstrate importance incorporating effects measurements on properties such devices.