Byrne D. J., Coffey W.T., Kalmykov Yu.P., Titov S.V. On the derivation of the escape rate of giant classical magnetic spins via an adaptation of the very low damping method of Kramers for particles. In: Annual German Physical Society (DPG) Spring Meeting: The Dynamics and Statistical Physics Division, Statistical Physics (General) II Subdivision, 31 March - 5 April 2019, Regensburg, Germany , DPG-Physik
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It is demonstrated how the original perturbative Kramers' method (starting from the phase space coordinates only) [H.A. Kramers, Physica 7, 384 (1940)] of determining the energy-controlled-diffusion equation for Newtonian particles with separable and additive Hamiltonians may be easily modified to yield the energy-controlled diffusion equation and thus the very low damping escape rate (including spin-transfer torque) for classical giant magnetic spins with two degrees of freedom. These have dynamics governed by the magnetic Langevin and Fokker-Planck equations and thus are generally based on non-separable and non-additive Hamiltonians. The derivation of the VLD rate directly from the (magnetic) Fokker-Planck equation in the space of polar angles of the magnetization following from the Kramers method is much simpler than those previously used which involve inter alia transformation to energy and phase variables as well as the properties of multiplicative noise.
| Тип объекта: | Доклад на конференции или семинаре (Доклад) |
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| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Бёрн Д., Коффи В.Т., Калмыков Ю.П., Титов С.В. |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 276 лаб. элементов систем лазерной связи |
| URI: | http://cplire.ru:8080/id/eprint/9884 |
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