English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We consider a finite-time quantum Otto heat engine that consists of twoisochoric (thermal-contact) process, where the system is alternatively coupledto a hot squeezed and a cold thermal reservoir, and two unitary driven strokes,where the system is isolated from these two baths and its von Neumann entropykeeps constant. Both quantum inner friction and coherence are generated alongthe driven stroke and coherence cannot be fully erased after the finite-timehot isochore. Using full counting statistics, we present the probabilitydistribution functions of heat injection and total work per cycle, which aredependent on the time duration along each process. With these, we derive theanalytical expressions for the thermodynamic quantities of the two-level heatengine, such as total work, thermodynamic efficiency, entropy production, andwork fluctuations, in which effects of coherence, squeezing, inner friction andfinite-time heat exchange are included. We then numerically determine thethermodynamic quantities and the fluctuations using the parameters employed inthe experimental implementation. Our results clarify the role of coherence andsqueezing in the performance and fluctuations in the quantum Otto engines.

Finite-time quantum Otto engine with a squeezed thermal bath: Role of quantum coherence and squeezing in the performance and fluctuations