Universal finite-time thermodynamics of many-body quantum machines from Kibble-Zurek scaling
Journal Article
·
· Physical Review Research
- Indian Inst. of Technology, Palakkad (India)
- Indian Inst. of Science Education and Research, Berhampur (India)
- Donostia International Physics Center, San Sebastián (Spain); Basque Foundation for Science, Bilbao (Spain). IKERBASQUE; Univ. of Massachusetts, Boston, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
We demonstrate the existence of universal features in the finite-time thermodynamics of quantum machines by considering a many-body quantum Otto cycle in which the working medium is driven across quantum critical points during the unitary strokes. Specifically, we consider a quantum engine powered by dissipative energizing and relaxing baths. We show that under very generic conditions, the output work is governed by the Kibble-Zurek mechanism; i.e., it exhibits a universal power-law scaling with the driving speed through the critical points. We also optimize the finite-time thermodynamics as a function of the driving speed. The maximum power and the corresponding efficiency take a universal form, and are reached for an optimal speed that is governed by the critical exponents. We exemplify our results by considering a transverse-field Ising spin chain as the working medium. For this model, we also show how the efficiency and power vary as the engine becomes critical.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Allamos, NM (United States)
- Sponsoring Organization:
- USDOE; Science and Engineering Research Board (SERB) India
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1834523
- Report Number(s):
- LA-UR--20-22256
- Journal Information:
- Physical Review Research, Journal Name: Physical Review Research Journal Issue: 4 Vol. 2; ISSN 2643-1564
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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