Comparison of Gaussian and super Gaussian laser beams for addressing atomic qubits

Author Info

Katharina Gillen-Christandl, California Polytechnic State University - San Luis ObispoFollow
Glen D. Gillen, California Polytechnic State University, San Luis ObispoFollow
M. J. Piotrowicz, University of Wisconsin-Madison
M. Saffman, University of Wisconsin-MadisonFollow

Recommended Citation

Published in Applied Physics B: Lasers and Optics, Volume 122, Issue 5, April 28, 2016.

The definitive version is available at https://doi.org/10.1007/s00340-016-6407-y.

Abstract

We study the fidelity of single-qubit quantum gates performed with two-frequency laser fields that have a Gaussian or super Gaussian spatial mode. Numerical simulations are used to account for imperfections arising from atomic motion in an optical trap, spatially varying Stark shifts of the trapping and control beams, and transverse and axial misalignment of the control beams. Numerical results that account for the three-dimensional distribution of control light show that a super Gaussian mode with intensity I~ e^-2(r/w₀)n provides reduced sensitivity to atomic motion and beam misalignment. Choosing a super Gaussian with n = 6 the decay time of finite temperature Rabi oscillations can be increased by a factor of 60 compared to an n = 2 Gaussian beam, while reducing crosstalk to neighboring qubit sites.

Disciplines

Physics

Copyright

© Springer-Verlag Berlin Heidelberg 2016

Number of Pages

20

Publisher statement

Open access articles in Springer Nature journals are published under Creative Commons licences. These provide an industry-standard framework to support easy re-use of open access material. Under Creative Commons licences, authors retain copyright of their articles. This article is provided under a under a CC BY-NC-ND (Creative Commons Attribution Non-Commercial No Derivatives 4.0 International license).