title: Quantum entanglement in plasmonic waveguides with near-zero mode indices.
abstract: We investigate the quantum entanglement between two quantum dots (QDs) in a plasmonic waveguide with a near-zero mode index, considering the dependence of concurrence on interdot distance, QD waveguide frequency detuning, and coupling strength ratio. High concurrence is achieved for a wide range of interdot distances 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 QD 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.
authors: Xing Ri
authors: XR
authors: Jin
authors: Lei
authors: L
authors: Sun
authors: Xiaodong
authors: X
authors: Yang
authors: Jie
authors: J
authors: Gao