We investigate the quantum entanglement between two quantum dots in a plasmonic waveguide with near-zero mode index, considering the dependence of concurrence on interdot distance, quantum dot-waveguide frequency detuning and coupling strength ratio. High concurrence is achieved for a wide range of interdot distance due to the near-zero mode index, which largely relaxes the strict requirement of interdot distance in conventional dielectric waveguides or metal nanowires. The proposed quantum dot-waveguide system with near-zero phase variation along the waveguide near the mode cutoff frequency shows very promising potential in quantum optics and quantum information processing.
@article{arxiv.1310.2962,
title = {Quantum entanglement in plasmonic waveguides with near-zero mode indices},
author = {Xing Ri Jin and Lei Sun and Xiaodong Yang and Jie Gao},
journal= {arXiv preprint arXiv:1310.2962},
year = {2013}
}