Optimal metrology with variational quantum circuits on trapped ions

Christian D. Marciniak1,∗ Thomas Feldker1,∗ Ivan Pogorelov, Raphael Kaubruegger, Denis V. Vasilyev, Rick van Bijnen, Philipp Schindler, Peter Zoller, Rainer Blatt, and Thomas Monz1,4† 1 Institut für Experimentalphysik, 6020 Innsbruck, Austria 2 Institute for Quantum Optics and Quantum Information, 6020 Innsbruck, Austria 3 Center for Quantum Physics, 6020 Innsbruck, Austria and 4 Alpine Quantum Technologies (AQT), 6020 Innsbruck, Austria (Dated: July 6, 2021)