Kramers' VLD method is adapted to classical spins with spin-transfer torque, yielding the same energy-diffusion equation and escape rate as prior longer derivations.
The phase is the generalized coordinate conjugate to the magnetic action S(E), i.e., the area inside a closed region of constant energy E [13,24]
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On a simple derivation of the very low damping escape rate for classical spins by modifying the method of Kramers
Kramers' VLD method is adapted to classical spins with spin-transfer torque, yielding the same energy-diffusion equation and escape rate as prior longer derivations.