(Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery
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| Format: | Preprint |
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2025
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| _version_ | 1866909929643704320 |
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| author | Yadav, Mahima Tiwari, Devvrat Banerjee, Subhashish |
| author_facet | Yadav, Mahima Tiwari, Devvrat Banerjee, Subhashish |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_15712 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | (Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery Yadav, Mahima Tiwari, Devvrat Banerjee, Subhashish Quantum Physics Statistical Mechanics 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. |
| title | (Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2504.15712 |