Author:
Zalivako Ilia V.,Borisenko Alexander S.,Semerikov Ilya A.,Korolkov Andrey E.,Sidorov Pavel L.,Galstyan Kristina P.,Semenin Nikita V.,Smirnov Vasiliy N.,Aksenov Mikhail D.,Fedorov Aleksey K.,Khabarova Ksenia Yu,Kolachevsky Nikolay N.
Abstract
The use of multilevel quantum information carriers, also known as qudits, has attracted significant interest as a way of further scaling quantum computing devices. However, such multilevel systems usually express shorter coherence time than their two-level counterparts, which limits their computational potential. We thus propose and experimentally demonstrate two approaches for realizing the continuous dynamical decoupling of magnetic-sensitive states with mF = ±1 for qudits encoded in optical transition of trapped 171Yb+ ions. We improve the coherence time of qudit levels by an order of magnitude (more than 9 ms) without any magnetic shielding, revealing the potential advantage of the symmetry of the 171Yb+ ion energy structure for counteracting magnetic field noise. Our results are a step toward realizing qudit-based algorithms using trapped ions.