Scaling NbTiN-based ac-powered Josephson digital to 400M devices/cm2

Anna Herr, Quentin Herr, Steve Brebels, Min-Soo Kim, Ankit Pokhrel, Blake Hodges, Trent Josephsen, Sabine ONeal, Ruiheng Bai, Katja Nowack, Anne-Marie Valente-Feliciano, Zsolt Tökei