Autonomous Calibration of Single Spin Qubit Operations
| Autor: | Boris Naydenov, Tommaso Calarco, Simone Montangero, Thomas Unden, Fedor Jelezko, Jonathan K. Zoller, Ressa S. Said, Florian Frank |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Computer Networks and Communications
Computer science Quantum dynamics FOS: Physical sciences 02 engineering and technology Topology 01 natural sciences lcsh:QA75.5-76.95 Quantum state 0103 physical sciences Computer Science (miscellaneous) 010306 general physics Spin (physics) Quantum information science Quantum Quantum Physics Quantum sensor Statistical and Nonlinear Physics 021001 nanoscience & nanotechnology lcsh:QC1-999 Quantum technology Computational Theory and Mathematics Qubit lcsh:Electronic computers. Computer science 0210 nano-technology Quantum Physics (quant-ph) lcsh:Physics |
| Zdroj: | npj Quantum Information, Vol 3, Iss 1, Pp 1-5 (2017) npj Quantum Information |
| Popis: | Fully autonomous precise control of qubits is crucial for quantum information processing, quantum communication, and quantum sensing applications. It requires minimal human intervention on the ability to model, to predict and to anticipate the quantum dynamics [1,2], as well as to precisely control and calibrate single qubit operations. Here, we demonstrate single qubit autonomous calibrations via closed-loop optimisations of electron spin quantum operations in diamond. The operations are examined by quantum state and process tomographic measurements at room temperature, and their performances against systematic errors are iteratively rectified by an optimal pulse engineering algorithm. We achieve an autonomous calibrated fidelity up to 1.00 on a time scale of minutes for a spin population inversion and up to 0.98 on a time scale of hours for a Hadamard gate within the experimental error of 2%. These results manifest a full potential for versatile quantum nanotechnologies. 9 pages, 5 figures |
| Databáze: | OpenAIRE |
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