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We investigate the real-time spin response of the $S=1$ Kitaev model uponstimuli of a pulsed magnetic field in one of the edges using the exactdiagonalization method. It is found that the pulsed magnetic field has noeffect on the appearance of the spin moments in the quantum spin liquid region,but induces the spin oscillations in the other edge region with a smallmagnetic field. This is understood by the existence of the itinerantquasiparticles, which carry the spin excitations without the spin polarizationin the quantum spin liquid state. This suggests that the spinfractionalizations occur in the $S=1$ Kitaev model as well as the exactlysolvable $S=1/2$ Kitaev one and the fractionalized quasiparticles play anessential role in the spin transport.

Spin transport in the Quantum Spin Liquid State in the $S=1$ Kitaev model: role of the fractionalized quasiparticles