Manipulating quantum spins by spin-polarized current: an approach based upon -symmetric quantum mechanics

Abstract

We propose a quantum processor based upon single-molecule magnets and spin transfer torque described by -symmetric quantum mechanics. In recent years -symmetric Hamiltonians have been used to obtain stability thresholds of various systems out of equilibrium. One such problem is the magnetization reversal due to the spin transfer torque generated by a spin-polarized current. So far the studies of this problem have mostly focused on a classical limit of a large spin. In this work we are discussing spin tunneling and quantum dynamics of a small spin induced by a spin polarized current within a -symmetric theory. This description can be used for manipulating spin qubits by electric currents.