Preserving multi-level quantum coherence by dynamical decoupling

Abstract

Quantum information processing with multi-level systems (qudits) provides additional features and applications than the two-level systems. However, qudits are more prone to dephasing and dynamical decoupling for qudits has never been experimentally demonstrated. Here, as a proof-of-principle demonstration, we experimentally apply dynamical decoupling to protect superpositions with three levels of a trapped ${}^9{\mathrm{Be}}^{+}$ ion from ambient noisy magnetic field, prolonging coherence by up to approximately an order of magnitude. Our demonstration, straightforwardly scalable to more levels, may open up a path toward long coherence quantum memory, metrology and information processing with qudits.

6 pages, 7 figures

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Cited by in corpus (3)

• Qudit Dynamical Decoupling on a Superconducting Quantum Processor
• Long-lived multilevel coherences and spin-1 dynamics encoded in the rotational states of ultracold molecules
• Dynamical decoupling protection for three-level systems