(Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery

• URL: http://arxiv.org/abs/2504.15712v1
• Date: Tue, 22 Apr 2025 08:53:57 GMT
• Title: (Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery
• Authors: Mahima Yadav, Devvrat Tiwari, Subhashish Banerjee,
• Abstract summary: We conceptualize the spin-boson system as a quantum battery and analyze its performance through metrics such as energy, ergotropy, anti-ergotropy, and battery capacity.<n>Our findings demonstrate the spin-boson model's versatility as a platform for efficient energy storage and transfer in quantum thermodynamic devices.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the spin-boson model's dynamical and thermodynamic features in the weak coupling regime using the weak coupling spin-boson (WCSB) and phase covariant (PC) master equations. Both unital (pure dephasing) and non-unital (dissipative) quantum channels are considered. On the dynamical side, we explore key quantum features including non-Markovianity, quantum speed limit, quantum coherence, and the system's steady-state behavior. Notably, the measures of non-Markovianity exhibit different behavior under WCSB and PC dynamics. From the quantum thermodynamic perspective, we conceptualize the spin-boson system as a quantum battery and analyze its performance through metrics such as energy, ergotropy, anti-ergotropy, and battery capacity. We further examine the roles of pure dephasing and dissipative processes in shaping the battery's performance. Our findings demonstrate the spin-boson model's versatility as a platform for efficient energy storage and transfer in quantum thermodynamic devices.

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