RT Journal Article T1 Compressed sensing of twisted photons A1 Bouchard, Frédéric A1 Koutný, Dominik A1 Hufnagel, Felix A1 Hradil, Zdenek A1 Rehácek, Jaroslav A1 Yong-Siah, Teo A1 Ahn, Daekun A1 Jeong, Hyunseok A1 Sánchez Soto, Luis Lorenzo A1 Leuchs, Gerd A1 Karimi, Ebrahim AB The ability to completely characterize the state of a system is an essential element for the emerging quantum technologies. Here, we present a compressed-sensing-inspired method to ascertain any rank-deficient qudit state, which we experimentally encode in photonic orbital angular momentum. We efficiently reconstruct these qudit states from a few scans with an intensified CCD camera. Since it only requires a small number of intensity measurements, our technique provides an easy and accurate way to identify quantum sources, channels, and systems. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. PB The Optical Society of America SN 1094-4087 YR 2019 FD 2019-06-24 LK https://hdl.handle.net/20.500.14352/13625 UL https://hdl.handle.net/20.500.14352/13625 LA eng NO © 2019 Optical Society of America.European Union’s Horizon 2020 Research and Innovation Programme (766970); Canada Research Chairs; Ontario’s Early Researcher Award; BK21 Plus Program (21A20131111123); National Research Foundation of Korea (2010-0018295); Korea Institute of Science and Technology Institutional Program (2E27800-18-P043); Ministerio de Economía y Competitividad (FIS2015-67963-P); Grant Agency of the Czech Republic (18-04291S); Internal Grant Agency of the Faculty of Sciences of Palacký University (PrF 2018-003) NO Union Europea. H2020 NO Ministerio de Economia y Competitividad (MINECO) NO Grant Agency of the Czech Republic NO Palacky University DS Docta Complutense RD 6 abr 2025