Nonequilibrium Extension of the Landau-Lifshitz-Gilbert Equation for Magnetic Systems

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Using the invariant operator method for an effective Hamiltonian including the radiation-spin interaction, we describe the quantum theory for magnetization dynamics when the spin system evolves nonadiabatically and out of equilibrium, $d \hatρ/dt \neq 0$. It is shown that the vector parameter of the invariant operator and the magnetization defined with respect to the density operator, both satisfying the quantum Liouville equation, still obey the Landau-Lifshitz-Gilbert equation.
RevTex 3 Pages in double column; no figure

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http://salesiana.dossiersoluciones.com/handle/123456789/24051

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0405599
 http://arxiv.org/abs/cond-mat/0405599

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arXiv