Prolonging qubit coherence: dynamic decoupling schemes studied in a Penning ion trap

Published

February 2, 2009

Author(s)

Hermann Uys, Michael J. Biercuk, Aaron Vandevender, N. Shiga, Wayne M. Itano, John J. Bollinger

Abstract

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.

Proceedings Title

Proc. OPTO SPIE

Volume

7725

Conference Dates

January 24-29, 2009

Conference Location

San Jose, CA

Pub Type

Conferences

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Keywords

decoherence, dynamical decoupling, Penning trap, spin echo, UDD

Citation

Uys, H. , Biercuk, M. , Vandevender, A. , Shiga, N. , Itano, W. and Bollinger, J. (2009), 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 April 19, 2024)