Prolonging qubit coherence: dynamic decoupling schemes studied in a Penning ion trap
Hermann Uys, Michael J. Biercuk, Aaron Vandevender, N. Shiga, Wayne M. Itano, John J. Bollinger
We present a study of dynamical decoupling schemes for the suppression of phase erros due to various noise environments using ions in a Penning ion trap as a model ensemble of qubits. By injecting frequency noise we demonstrate that in an Ohmic noise spectrum with a sharp, high-frequency cutoff the recently proposed UDD decoupling sequence gives superior noise suppression to the traditional CPMG technique. Under only the influence of ambient magnetic field fluctuations with a 1ω2 spectrum we find little benefit from using the UDD sequence consistent with theoretical predictions for spectra with soft cutoffs. Finally, we implement an optimization algorithm using measurement feedback, demonstrating that local optimization of dynamical decoupling can lead to further gains in error suppression.
, Biercuk, M.
, Vandevender, A.
, Shiga, N.
, Itano, W.
and Bollinger, J.
Prolonging qubit coherence: dynamic decoupling schemes studied in a Penning ion trap, Proc. OPTO SPIE, San Jose, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901201
(Accessed December 2, 2023)