A practical scheme for the demonstration of perfect one-sideddevice-independent quantum secret sharing is proposed. The scheme involves athree-mode optomechanical system in which a pair of independent cavity modes isdriven by short laser pulses and interact with a movable mirror. We demonstratethat by tuning the laser frequency to the blue (anti-Stokes) sideband of theaverage frequency of the cavity modes, the modes become mutually coherent andthen may collectively steer the mirror mode to a perfectEinstein-Podolsky-Rosen state. The scheme is shown to be experimentallyfeasible, it is robust against the frequency difference between the modes,mechanical thermal noise and damping, and coupling strengths of the cavitymodes to the mirror.
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