A trapped ion quantum computer with robust entangling gates and quantum coherent feedback
Abstract
Quantum computers are expected to achieve a significant speed-up over classical computers in solving a range of computational problems. Chains of ions held in a linear Paul trap are a promising platform for constructing such quantum computers, due to their long coherence times and high quality of control. Here we report on the construction of a small, five-qubit, universal quantum computer using ions in an RF trap. All basic operations, including initialization, quantum logic operations, and readout, are performed with high fidelity. Selective two-qubit and single-qubit gates, implemented using a narrow linewidth laser, comprise a universal gate set, allowing realization of any unitary on the quantum register. We review the main experimental tools, and describe in detail unique aspects of the computer: the use of robust entangling gates and the development of a quantum coherent feedback system through EMCCD camera acquisition. The latter is necessary for carrying out quantum error correction protocols in future experiments.
Cite
@article{arxiv.2111.04155,
title = {A trapped ion quantum computer with robust entangling gates and quantum coherent feedback},
author = {Tom Manovitz and Yotam Shapira and Lior Gazit and Nitzan Akerman and Roee Ozeri},
journal= {arXiv preprint arXiv:2111.04155},
year = {2021}
}