Certifying Multilevel Coherence in the Motional State of a Trapped Ion
Ollie Corfield, Jake Lishman, Chungsun Lee, Jacopo Mosca Toba, George Porter, Johannes Heinrich, S. C. Webster, Florian Mintert, Richard Claude Thompson · PRX Quantum · 2021
A scheme based on an interference pattern is used to experimentally certify the existence of multiple superposition elements in the motional state of a single ion, without risking false positives from imperfect operations.