Remote preparation of single photon vortex thermal states T. Häffner, G. L. Zanin, R. M. Gomes, L. C. Céleri and P. H. Souto Ribeiro Eur. Phys. J. Plus, 135 7 (2020) 601 Published online: 25 July 2020 DOI: 10.1140/epjp/s13360-020-00609-z