Spin-mechanical thermal machines

• URL: http://arxiv.org/abs/2410.00439v1
• Date: Tue, 1 Oct 2024 06:37:58 GMT
• Title: Spin-mechanical thermal machines
• Authors: Mohamed Hatifi, Anshuman Nayak, Jason Twamley,
• Abstract summary: We introduce a method to construct a quantum battery and a quantum Otto heat engine. By precisely controlling the NV spin, we enable efficient energy exchange despite significant detuning. We implement a quantum Otto engine that produces mechanical work at maximum efficiency without decoupling from the hot bath.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce a method to construct a quantum battery and a quantum Otto heat engine using a Nitrogen-Vacancy (NV) center spin coupled to a mechanical oscillator in a highly detuned regime. By precisely controlling the NV spin, we enable efficient energy exchange despite significant detuning, challenging conventional assumptions. This leads to a robust mechanical quantum battery and a cooling scheme driving the oscillator toward its ground state. Leveraging this, we implement a quantum Otto engine that produces mechanical work at maximum efficiency without decoupling from the hot bath, paving the way for practical quantum thermal machines.

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