220 research outputs found
Continuous-variable dense coding by optomechanical cavities
In this paper, we show how continuous-variable dense coding can be
implemented using entangled light generated from a membrane-in-the-middle
geometry. The mechanical resonator is assumed to be a high reflectivity
membrane hung inside a high quality factor cavity. We show that the mechanical
resonator is able to generate an amount of entanglement between the optical
modes at the output of the cavity, which is strong enough to approach the
capacity of quantum dense coding at small photon numbers. The suboptimal rate
reachable by our optomechanical protocol is high enough to outperform the
classical capacity of the noiseless quantum channel
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