Fig. 3
From: Quantum engine efficiency bound beyond the second law of thermodynamics
Entropy and energy of a cavity mode interacting with a squeezed bath. Entropy, ergotropy and energy changes for a single cavity mode prepared in the vacuum state that interacts with an outside bath in a squeezed-vacuum state (Fig. 2b) obtained by a numerical integration of the master equation. The energies are given in units of ħω and the entropy in units of kB. Parameters: ω = 10κ and squeezing parameter r = 0.4, κ being the decay rate of the cavity
