Driving Quantum Heat Engines Beyond Classical Limits through Multilevel Coherence
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866914449002070016 |
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| author | Wang, Hui Maleki, Yusef Munro, William J. Scully, Marlan O. |
| author_facet | Wang, Hui Maleki, Yusef Munro, William J. Scully, Marlan O. |
| contents | Quantum coherence provides a controllable thermodynamic resource that can raise or lower the effective temperature of a cavity mode, enabling efficiency tuning in quantum heat engines. Here, we derive analytic expressions for the effective engine temperature, demonstrating the enhanced temperature tunability achievable via $N$-level ground-state coherence. We further unify ground- and excited-state coherence within a single analytic framework, revealing their interplay as a mechanism for thermodynamic control. Such quantum resources serve as tunable parameters that enable switching between heating, cooling, and cancellation regimes, driving the effective temperature from near-zero to divergence. Ultimately, our framework connects and generalizes previous models of quantum heat engines, and we identify rubidium atoms as a promising candidate for experimentally realizing these coherence-assisted effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_04873 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Driving Quantum Heat Engines Beyond Classical Limits through Multilevel Coherence Wang, Hui Maleki, Yusef Munro, William J. Scully, Marlan O. Quantum Physics Quantum coherence provides a controllable thermodynamic resource that can raise or lower the effective temperature of a cavity mode, enabling efficiency tuning in quantum heat engines. Here, we derive analytic expressions for the effective engine temperature, demonstrating the enhanced temperature tunability achievable via $N$-level ground-state coherence. We further unify ground- and excited-state coherence within a single analytic framework, revealing their interplay as a mechanism for thermodynamic control. Such quantum resources serve as tunable parameters that enable switching between heating, cooling, and cancellation regimes, driving the effective temperature from near-zero to divergence. Ultimately, our framework connects and generalizes previous models of quantum heat engines, and we identify rubidium atoms as a promising candidate for experimentally realizing these coherence-assisted effects. |
| title | Driving Quantum Heat Engines Beyond Classical Limits through Multilevel Coherence |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.04873 |