Experimental demonstration of an efficient, semi-device-independent photonic indistinguishability witness
Reinier van der Meer, Peter Hooijschuur, Franciscus H. B. Somhorst, Pim Venderbosch, Michiel de Goede, Ben Kassenberg, Henk Snijders, Caterina Taballione, Jörn P. Epping, Hans van den Vlekkert, Nathan Walk, Pepijn W. H. Pinkse, Jelmer J. Renema · arXiv (Cornell University) · 2021
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, we 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.