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Trapped-Ion Quantum Computer with Robust Entangling Gates and Quantum Coherent Feedback

Trapped-Ion Quantum Computer with Robust Entangling Gates and Quantum Coherent Feedback

Authors :
Tom Manovitz
Yotam Shapira
Lior Gazit
Nitzan Akerman
Roee Ozeri
Source :
PRX Quantum, Vol 3, Iss 1, p 010347 (2022)
Publication Year :
2022
Publisher :
American Physical Society, 2022.

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}Sr^{+} ions in a radio-frequency (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-line-width 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 electron-multiplying CCD camera acquisition. The latter is necessary for carrying out quantum error-correction protocols in future experiments.

Details

Language :
English
ISSN :
26913399
Volume :
3
Issue :
1
Database :
Directory of Open Access Journals
Journal :
PRX Quantum
Publication Type :
Academic Journal
Accession number :
edsdoj.742d48872f4a9397026d6789d865c6
Document Type :
article
Full Text :
https://doi.org/10.1103/PRXQuantum.3.010347