PHOQUSING beneficiary QuiX Quantum, together with the University of Twente, published a new paper: “Experimental demonstration of an efficient, semi-device-independent photonic indistinguishability witness”
Efficient and reliable measurements of photonic indistinguishability are crucial to solidify claims of a quantum advantage in photonics. Existing indistinguishability witnesses may be vulnerable to implementation loopholes, showing the need for a measurement which depends on as few assumptions as possible. Here, they introduce a semi-device-independent witness of photonic indistinguishability and measure it on an integrated photonic processor, certifying three-photon indistinguishability in a way that is insensitive to implementation errors in our processor.
R. van der Meer, P. Hooijschuur, F. H.B. Somhorst, P. Venderbosch, M. de Goede, B. Kassenberg, H. Snijders, C. Taballione, J. Epping, H. van den Vlekkert, N. Walk, P. W.H. Pinkse, J. J. Renema, Experimental demonstration of an efficient, semi-device-independent photonic indistinguishability witness (2021), [arXiv:2112.00067]