Laser-free trapped-ion entangling gates with simultaneous insensitivity to qubit and motional decoherence

The dominant error sources for state-of-the-art laser-free trapped-ion entangling gates are decoherence of the qubit state and the ion motion. The effect of these decoherence mechanisms can be suppressed with additional control fields, or with techniques that have the disadvantage of reducing gate s...

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Bibliographic Details
Published in:arXiv.org 2020-03
Main Authors: Sutherland, R T, Srinivas, R, Burd, S C, Knaack, H M, Wilson, A C, Wineland, D J, Leibfried, D, Allcock, D T C, Slichter, D H, Libby, S B
Format: Article
Language:English
Subjects:
Deer
Ion motion
Lasers
Online Access:Get full text
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Summary:The dominant error sources for state-of-the-art laser-free trapped-ion entangling gates are decoherence of the qubit state and the ion motion. The effect of these decoherence mechanisms can be suppressed with additional control fields, or with techniques that have the disadvantage of reducing gate speed. Here, we propose using a near-motional-frequency magnetic field gradient to implement a laser-free gate that is simultaneously resilient to both types of decoherence, does not require additional control fields, and has a relatively small cost in gate speed.
ISSN:2331-8422
DOI:10.48550/arxiv.1910.14178