Entanglement limits in topological protection of two-photon edge-edge states

Authors :: Konrad Tschernig
Armando Perez-Leija
Miguel A. Bandres
Kurt Busch
Mikhail Ivanov
Álvaro Jiménez-Galán
Demetrios N. Christodoulides
Source :: Frontiers in Optics / Laser Science.
Publication Year :: 2020
Publisher :: Optica Publishing Group, 2020.
Abstract: We study fundamental limitations to topological protection induced by increasing the amount of entanglement in nonseparable two-photon states. We identify the physics underlying such vulnerability and the conditions for robust protection of two-photon states.