Quantum engines with interacting Bose-Einstein condensates

ESTRADA, JULIÁN AMETTE; MAYO, FRANCO; RONCAGLIA, AUGUSTO J.; MININNI, PABLO D.

Physical Review A

American Physical Society

Año: 2024 vol. 109

2469-9926

We consider a quantum Otto cycle with an interacting Bose-Einstein condensate at finite temperature. We present a procedure to evolve this system in time in three spatial dimensions, in which closed (adiabatic) strokes are described by the Gross-Pitaevskii equation and open (isochoric) strokes are modeled using a stochastic Ginzburg-Landau equation. We analyze the effect on the thermodynamic efficiency of the strength of interactions, the frequency of the harmonic trap, and the temperatures of the reservoirs. The efficiency has little sensitivity to changes in the temperatures but decreases as interactions increase. However, stronger interactions allow for faster cycles and for substantial increases in power.