Quantum interference enables constant-time quantum information processing
Magdalena Stobińska, A. Buraczewski, M. Moore, William R. Clements, J. J. Renema, S. W. Nam, T. Gerrits, A. Lita, W. S. Kolthammer, A. Eckstein, Ian A. Walmsley · Science Advances · 2019
-nary (qudit) architecture we use comprises only one gate and offers processing time independent of the input size. The gate may use a multiphoton Hong-Ou-Mandel effect. Existing quantum technologies may scale it up toward diverse applications.