Abstract
We apply a recently developed quantum theory of spin torque to study the effect of the quantum noise on the magnetization switching. The quantum noise induces considerable fluctuation of the switching time at zero temperature. By including the thermal noise, the temperature dependence of the expectation value and standard deviation of the switching time are obtained, and the results are fitted to an effective first passage model. Our theoretical predictions can be examined in single-shot experiments of spin-torque-driven switching.
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