Dynamics of molecular magnet Fe₈ interacting with an injecting spin-polarized electron

Quantum dynamics time evolution of a molecular magnet Fe₈ interacting with an electron nuclear spin is studied by solving the time-dependent Schrödinger equations. It is found that the variation of Fe₈ magnetization and the nuclear spin crucially depends on the interaction strength. The time evolution of the entanglement between the injecting electron and Fe₈ is evaluated. It is observed that the entanglement oscillates in time and is tightly related to the spin variation of the injecting electron. From these characteristics, the technique for the reversing and read-out of Fe₈ spin states is suggested.