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 sp...

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Bibliographic Details
Published in:Physical review. A 2020-04, Vol.101 (4), Article 042334
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:
atom & ion trapping & guiding
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
coherent control
first-principle calculations
open quantum systems & decoherence
quantum computation
quantum gates
quantum information with trapped ions
trapped ions
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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. In this study, 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:2469-9926
2469-9934
DOI:10.1103/PhysRevA.101.042334