**About the Editor**

**Michel Planat** was a researcher at the National Center of Scientific Research in France from 1982 to 2018. From 1980 to 2001, he researched nonlinear waves in piezoelectric crystals and 1/f noise in quartz resonators. He established links between 1/f noise and number theory. He also researched the Riemann hypothesis. He discovered Ramanujan sums signal processing. From 2002 to 2018, he was interested in quantum information theory with work concerning mutually unbiased bases, quantum entanglement and contextuality, and quantum computing, using mathematical tools such as finite geometries, number theory, dessin d'enfants, and free group theory. Since 2019, he is a visiting scientist at FEMTO-ST Institute in Besanc¸on, France. He is also an associate research scientist at Quantum Gravity Research in Los Angeles. His current research is about topological quantum computing from three- and four-manifolds to establish bridges between quantum computing and quantum gravity.
