Superdense coding for V-shaped channel and cylindrical geometry

Abstract

We have examined the possibility of quantum dense coding for the V-shaped channel and cylin- drical geometry of plasmonic waveguides by assuming certain initial states at different dipole-dipole distances. It is found that the dense coding capacity initially decreases and then gradually increases until it becomes steady (χ = 1) at later time. We also revealed the optimal time valid for super- dense coding regarding each initial state. It is worth noting that dense coding capacity is valid for all other states for a time less than optimal time (t < τo) except for pure state. The estimated optimal time for a V-shaped channel is prominent due to greater β-factor accomplishing it as a prosperous geometry for superdense coding. The greater optimal time for V-shaped channel entitles this geometry a benchmark for the practical applications of quantum information technology.