Converting coherence into work with a fully quantum engine
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917069597966336 |
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| author | Kwon, MinSik Denzler, Tobias Maier, Rouven Vorobyov, Vadim Dasari, Durga Bhaktavatsala Rao Lutz, Eric Wrachtrup, Jörg |
| author_facet | Kwon, MinSik Denzler, Tobias Maier, Rouven Vorobyov, Vadim Dasari, Durga Bhaktavatsala Rao Lutz, Eric Wrachtrup, Jörg |
| contents | Heat engines convert thermal energy into mechanical work. We here report the experimental realization of a fully quantum engine that converts quantum coherence into work. A single solid-state spin in diamond is fueled by a coherent bath and cyclically stores energy in a spin quantum battery. We establish quantum-enhanced performance by showing that almost 200$\%$ more work is produced after a few cycle compared to the corresponding classical engine. We obtain concrete criteria for successful coherence-to-work conversion, and highlight the importance of a coherent motor-battery interaction. This device harnesses nonclassical features during all stages of its cycle, and demonstrates the functionality of a nanomachine whose parts are all quantum coherent. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06096 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Converting coherence into work with a fully quantum engine Kwon, MinSik Denzler, Tobias Maier, Rouven Vorobyov, Vadim Dasari, Durga Bhaktavatsala Rao Lutz, Eric Wrachtrup, Jörg Quantum Physics Mesoscale and Nanoscale Physics Heat engines convert thermal energy into mechanical work. We here report the experimental realization of a fully quantum engine that converts quantum coherence into work. A single solid-state spin in diamond is fueled by a coherent bath and cyclically stores energy in a spin quantum battery. We establish quantum-enhanced performance by showing that almost 200$\%$ more work is produced after a few cycle compared to the corresponding classical engine. We obtain concrete criteria for successful coherence-to-work conversion, and highlight the importance of a coherent motor-battery interaction. This device harnesses nonclassical features during all stages of its cycle, and demonstrates the functionality of a nanomachine whose parts are all quantum coherent. |
| title | Converting coherence into work with a fully quantum engine |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.06096 |