Bosonic two-stroke heat engines with polynomial nonlinear coupling
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909617335828480 |
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| author | Chesi, Giovanni Macchiavello, Chiara Sacchi, Massimiliano Federico |
| author_facet | Chesi, Giovanni Macchiavello, Chiara Sacchi, Massimiliano Federico |
| contents | We study the thermodynamics of two-stroke heat engines where two bosonic modes $a$ and $b$ are coupled by the general nonlinear interaction $V_θ = \exp {(θa^{\dagger n}b^m -θ^* a^n b^{\dagger m})}$. By adopting the two-point measurement scheme we retrieve the distribution of the stochastic work, and hence the relative fluctuations of the extracted work up to the second order in the coupling $θ$. We identify the optimal interactions providing large average work with small fluctuations in the operational regime of the heat engine. Then, we consider the specific cases $n=2$, $m=1$ and $n=1$, $m=2$ up to the fourth order in $θ$. We optimize the average work and the signal-to-noise ratio over the frequencies of the bosonic modes and the temperatures of the reservoirs. Finally, we determine the thermodynamic uncertainty relations for these processes in relation with the order of the expansion of the unitary interaction $V_θ$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_17409 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Bosonic two-stroke heat engines with polynomial nonlinear coupling Chesi, Giovanni Macchiavello, Chiara Sacchi, Massimiliano Federico Quantum Physics We study the thermodynamics of two-stroke heat engines where two bosonic modes $a$ and $b$ are coupled by the general nonlinear interaction $V_θ = \exp {(θa^{\dagger n}b^m -θ^* a^n b^{\dagger m})}$. By adopting the two-point measurement scheme we retrieve the distribution of the stochastic work, and hence the relative fluctuations of the extracted work up to the second order in the coupling $θ$. We identify the optimal interactions providing large average work with small fluctuations in the operational regime of the heat engine. Then, we consider the specific cases $n=2$, $m=1$ and $n=1$, $m=2$ up to the fourth order in $θ$. We optimize the average work and the signal-to-noise ratio over the frequencies of the bosonic modes and the temperatures of the reservoirs. Finally, we determine the thermodynamic uncertainty relations for these processes in relation with the order of the expansion of the unitary interaction $V_θ$. |
| title | Bosonic two-stroke heat engines with polynomial nonlinear coupling |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2502.17409 |