Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session F04: Quantum Gates for Trapped Ions
8:00 AM–10:00 AM,
Wednesday, June 5, 2024
Room: 201BC
Chair: Georgi Gary Rozenman, Massachusetts Institute of Technology
Abstract: F04.00002 : Enabling coherent operations in large registers of trapped ions containing multiple qubit types
8:12 AM–8:24 AM
Presenter:
Jamie D Leppard
(University of Oxford)
Authors:
Jamie D Leppard
(University of Oxford)
Ana S Sotirova
(Department of Physics, University of Oxford)
Andres Vazquez-Brennan
(University of Oxford)
Sophie M Decoppet
(University of Oxford)
David P Nadlinger
(University of Oxford)
Fabian Pokorny
(University of Oxford)
Chris J Ballance
(University of Oxford)
Uniquely for barium, qubits implemented in either the ground S1/2 level or metastable D5/2 level can be coherently manipulated via a two-photon Raman process using 532nm light with very low scattering error [2]. Individual qubits are addressed using a photonic chip that directs light from a fibre network to the ions, providing individual phase, frequency, and amplitude control with cross-talk below the 10−3 level [3]. By applying just one of the Raman tones, we
induce an AC Stark shift in the quadrupole transition from S1/2 → D5/2 and use this to demonstrate selective shelving of individual qubits. This enables individual addressing for all coherent operations, as well as state preparation and measurement, thus enabling mid-circuit measurements and in-sequence cooling.
[1] D. Allcock et al., Applied Physics Letters, vol. 119, p. 214 002, 2021.
[2] I. Moore, W. Campbell, E. Hudson, M. Boguslawski, D. Wineland, and D. Allcock, Phys. Rev. A, vol. 107, p. 032 413, 3 2023.
[3] A. Sotirova, B. Sun et al., “Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip,” arXiv preprint arXiv:2310.13419, 2023.
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