Controllable waveguide via dielectric cylinder covered with graphene: Tunable entanglement Xiaodong Zeng, Zeyang Liao, M. Al-Amri and M. Suhail Zubairy EPL, 115 1 (2016) 14002 Published online: 01 August 2016 DOI: 10.1209/0295-5075/115/14002