Francesco Ceccarelli⁵, Roberto Osellame⁵, Xi Chen^7,†, and Philip Walther^1,8,9,‡

• ¹University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology (VCQ), Boltzmanngasse 5, 1090 Vienna, Austria
• ²Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, 48080 Bilbao, Spain
• ³EHU Quantum Center, University of the Basque Country UPV/EHU, Barrio Sarriena, s/n, 48940 Leioa, Spain
• ⁴University of Vienna, Faculty of Physics, Vienna Doctoral School of Physics (VDSP), Boltzmanngasse 5, 1090 Vienna, Austria
• ⁵Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche (IFN-CNR), piazza L. Da Vinci 32, 20133 Milano, Italy
• ⁶Dipartimento di Fisica, Politecnico di Milano, piazza L. Da Vinci 32, 20133 Milano, Italy
• ⁷Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, E-28049 Madrid, Spain
• ⁸Institute for Quantum Optics and Quantum Information Sciences (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, Vienna 1090, Austria
• ⁹QUBO Technology GmbH, 1090 Vienna, Austria

• ^*These authors contributed equally to this work.
• ^†Contact author: xi.chen@csic.es
• ^‡Contact author: philip.walther@univie.ac.at