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The time evolution of low energy spin states of a single molecular magnet ina local electric field is investigated. The decoherence of the driven singlemolecular magnet weakly coupled to a thermal bosonic environment is analyzed bythe second-order time-convolutionless non-Markovian master equation. If thecharacteristic time of the system is much smaller than the correlation time ofthe environment, the analytical expression of the reduced density matrix of thesystem is obtained. The non-Markovian dynamics of the spin states at lowtemperatures is induced by the memory effects in the decay rates. Thenon-Markovian oscillation of the Bloch vector is presented. The quantumdecoherence can be effectively restrained with the help of the reasonablemanipulation of the environment spectral density function and local electricfield. The influence of the dissipation on the pointer states are investigatedby the von Neumann entropy. The pointer states can be selected by theenvironment.

Quantum decoherence of spin states in an electric-field controllable single molecular magnet