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Title: Strongly Coupled Quantum Heat Machines

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [1]
  1. Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States

Energy conversion of heat into work at the quantum level is modeled by quantum heat machines (QHMs) generally assumed to operate at weak coupling to the baths. This supposition is grounded in the separability principle between systems and allows the derivation of the evolution equation. In the weak coupling regime, the machine’s output is limited by the coupling strength, restricting their application. Seeking to overcome this limitation, we analyze QHMs in the virtually unexplored strong coupling regime here, where separability, as well as other standard thermodynamic assumptions, may no longer hold. We demonstrate that strongly coupled QHMs may be as efficient as their weakly coupled counterparts. Furthermore, we find a novel turnover behavior where their output saturates and disappears in the limit of ultrastrong coupling.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Excitonics (CE)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001088
OSTI ID:
1415264
Alternate ID(s):
OSTI ID: 1370897
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Vol. 6 Journal Issue: 17; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 67 works
Citation information provided by
Web of Science

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