arXiv Open Access 2024

Stochastic Thermodynamics of Micromagnetics

Mingnan Ding Jun Wu Xiangjun Xing

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Abstrak

In this work, we study the stochastic thermodynamics of micro-magnetic systems. We first formulate the stochastic dynamics of micro-magnetic systems by incorporating noises into Landau-Lifshitz (LL) equation, which describes the irreversible and deterministic dynamics of magnetic moments. The resulting stochastic Landau-Lifshitz (sLL) equation obeys detailed balance, which guarantees that, with the external field fixed, the system converges to thermodynamic equilibrium with vanishing entropy production and with non-vanishing probability current. We then discuss various thermodynamic variables both at the trajectory level and at the ensemble level, and further establish both the first and the second laws of thermodynamics. Finally, we establish fluctuation theorems, and verify them using numerical simulations.

Topik & Kata Kunci

cond-mat.stat-mech cond-mat.mes-hall cond-mat.soft

Penulis (3)

Mingnan Ding

Jun Wu

Xiangjun Xing

Format Sitasi

APA MLA BibTeX

Ding, M., Wu, J., Xing, X. (2024). Stochastic Thermodynamics of Micromagnetics. https://arxiv.org/abs/2404.13612

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2024
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓