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

References in corpus (12)

• Randomized Benchmarking of Quantum Gates
• How to Enhance Dephasing Time in Superconducting Qubits
• A universal qudit quantum processor with trapped ions
• Robust dynamical decoupling for quantum computing and quantum memory
• Quantum secret sharing with qudit graph states
• Magic state distillation in all prime dimensions using quantum Reed-Muller codes
• Arbitrarily Accurate Pulse Sequences for Robust Dynamical Decoupling
• Randomized Benchmarking of Multi-Qubit Gates
• A long-lived Zeeman trapped-ion qubit
• Engineering of arbitrary U(N) transformations by quantum Householder reflections
• Single-Spin Spectrum-Analyzer for a Strongly Coupled Environment
• Analog quantum simulation of chemical dynamics

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