Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector

• URL: http://arxiv.org/abs/2504.01435v1
• Date: Wed, 02 Apr 2025 07:38:58 GMT
• Title: Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector
• Authors: Tomoya Hirotani, Kensuke Gallock-Yoshimura,
• Abstract summary: We explore a relativistic quantum Otto heat engine with a qutrit as the working substance interacting with a quantum scalar field in curved spacetime.<n>We derive a general positive work condition in terms of the effective temperature that each pair of energy levels perceives.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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