Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866913918605066240 |
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| author | Hirotani, Tomoya Gallock-Yoshimura, Kensuke |
| author_facet | Hirotani, Tomoya Gallock-Yoshimura, Kensuke |
| contents | In this study, we explore a relativistic quantum Otto heat engine with a qutrit as the working substance interacting with a quantum scalar field in curved spacetime. Unlike qubits, which extract work by simply expanding or shrinking a single energy gap, qutrits allow multiple energy gaps to be adjusted independently, enabling more versatile work extraction in the quantum Otto cycle. We derive a general positive work condition in terms of the effective temperature that each pair of energy levels perceives. Moreover, we discuss additional subtleties that are absent when using a qubit, such as the generation of coherence terms in the density matrix due to interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01435 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector Hirotani, Tomoya Gallock-Yoshimura, Kensuke Quantum Physics General Relativity and Quantum Cosmology In this study, we explore a relativistic quantum Otto heat engine with a qutrit as the working substance interacting with a quantum scalar field in curved spacetime. Unlike qubits, which extract work by simply expanding or shrinking a single energy gap, qutrits allow multiple energy gaps to be adjusted independently, enabling more versatile work extraction in the quantum Otto cycle. We derive a general positive work condition in terms of the effective temperature that each pair of energy levels perceives. Moreover, we discuss additional subtleties that are absent when using a qubit, such as the generation of coherence terms in the density matrix due to interactions. |
| title | Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector |
| topic | Quantum Physics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2504.01435 |