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

Hermann Uys; Michael J. Biercuk; Aaron P. VanDevender; Nobuyasu Shiga; Wayne M. Itano; John J. Bollinger

doi:10.1117/12.823179

2 February 2009 Prolonging qubit coherence: dynamical decoupling schemes studied in a Penning ion trap

Hermann Uys, Michael J. Biercuk, Aaron P. VanDevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger

Proceedings Volume 7225, Advanced Optical Concepts in Quantum Computing, Memory, and Communication II; 72250R (2009) https://doi.org/10.1117/12.823179
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We present a study of dynamical decoupling schemes for the suppression of phase errors from various noise environments using ions in a Penning 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 noise suppression superior to the traditional CPMG technique. Under only the influence of ambient magnetic field fluctuations with a 1/ω⁴ power spectrum, we find little benefit from using the UDD sequence, consistent with theoretical predictions for dynamical decoupling performance in the presence of noise spectra with soft cutoffs. Finally, we implement an optimization algorithm using measurement feedback, demonstrating that local optimization of dynamical decoupling can further lead to significant gains in error suppression over known sequences.

Citation Download Citation

Hermann Uys, Michael J. Biercuk, Aaron P. VanDevender, Nobuyasu Shiga, Wayne M. Itano, and John J. Bollinger "Prolonging qubit coherence: dynamical decoupling schemes studied in a Penning ion trap", Proc. SPIE 7225, Advanced Optical Concepts in Quantum Computing, Memory, and Communication II, 72250R (2 February 2009); https://doi.org/10.1117/12.823179

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available