AUTHOR= Frontiers Editorial Office 

TITLE=Retraction: Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

JOURNAL=Frontiers in Physics

VOLUME=Volume 5 - 2017

YEAR=2017

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2017.00015

DOI=10.3389/fphy.2017.00015

ISSN=2296-424X