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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
- 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.
- Subjects :
- Physics
QC1-999
Computer software
QA76.75-76.765
Subjects
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