Universal Coherence-Induced Power Losses of Quantum Heat Engines in Linear Response

Kay Brandner, Michael Bauer, Udo Seifert

Research output: Contribution to journalArticleScientificpeer-review

38 Citations (Scopus)
189 Downloads (Pure)


We identify a universal indicator for the impact of coherence on periodically driven quantum devices by dividing their power output into a classical contribution and one stemming solely from superpositions. Specializing to Lindblad dynamics and small driving amplitudes, we derive general upper bounds on both the coherent and the total power of cyclic heat engines. These constraints imply that, for sufficiently slow driving, coherence inevitably leads to power losses in the linear-response regime. We illustrate our theory by working out the experimentally relevant example of a single-qubit engine.

Original languageEnglish
Article number170602
Pages (from-to)1-7
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 25 Oct 2017
MoE publication typeA1 Journal article-refereed

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