Nature Physics, 21, 3 (2025)Schrödinger cat states of a nuclear spin qudit in siliconYu, Xi; Wilhelm, Benjamin; Holmes, Danielle; Vaartjes, Arjen; Schwienbacher, Daniel; Nurizzo, Martin; Kringhoj, Anders; van Blankenstein, Mark R.; Jakob, Alexander M.; Gupta, Pragati; Hudson, Fay E.; Itoh, Kohei M.; Murray, Riley J.; Blume-Kohout, Robin; Ladd, Thaddeus D.; Anand, Namit; Dzurak, Andrew S.; Sanders, Barry C.; Jamieson, David N.; Morello, Andrea