Topologically protected entangled photonic states

Nanophotonics

article

Michelle Wang¹  Cooper Doyle¹  Bryn Bell³  Matthew J. Collins⁴  Eric Magi¹  Benjamin J. Eggleton¹  Mordechai Segev⁵  Andrea Blanco-Redondo¹ 

[1] Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney;The University of Sydney Nano Institute (Sydney Nano), The University of Sydney;Clarendon Laboratory, Department of Physics, University of Oxford;MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University;Physics Department and Solid State Institute, Technion-Israel Institute of Technology

关键词: topological photonics;    entanglement;    nanophotonics;    silicon photonics;   

DOI  :  10.1515/nanoph-2019-0058

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Entangled multiphoton states lie at the heart of quantum information, computing, and communications. In recent years, topology has risen as a new avenue to robustly transport quantum states in the presence of fabrication defects, disorder, and other noise sources. Whereas topological protection of single photons and correlated photons has been recently demonstrated experimentally, the observation of topologically protected entangled states has thus far remained elusive. Here, we experimentally demonstrate the topological protection of spatially entangled biphoton states. We observe robustness in crucial features of the topological biphoton correlation map in the presence of deliberately introduced disorder in the silicon nanophotonic structure, in contrast with the lack of robustness in non-topological structures. The topological protection is shown to ensure the coherent propagation of the entangled topological modes, which may lead to robust propagation of quantum information in disordered systems.

【 授权许可】

CC BY