A trapped ion quantum computer with robust entangling gates and quantum coherent feedback

• URL: http://arxiv.org/abs/2111.04155v1
• Date: Sun, 7 Nov 2021 19:17:23 GMT
• Title: A trapped ion quantum computer with robust entangling gates and quantum coherent feedback
• Authors: Tom Manovitz, Yotam Shapira, Lior Gazit, Nitzan Akerman and Roee Ozeri
• Abstract summary: Chains of ions held in a linear Paul trap are a promising platform for constructing such quantum computers. We report on the construction of a small, five-qubit, universal quantum computer using $88textSr+$ ions in an RF trap.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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 $^{88}\text{Sr}^{+}$ 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.

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