Experimental Time-Optimal Universal Control of Spin Qubits in Solids
Name
PhysRevLett.117.170501.pdf
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796.63 KB
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Checksum (MD5)
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Author(s)
Geng, Jianpei
Wu, Yang
Wang, Xiaoting
Xu, Kebiao
Shi, Fazhan
Xie, Yijin
Rong, Xing
Du, Jiangfeng
Date Issued
October 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Geng, Jianpei et al. “Experimental Time-Optimal Universal Control of Spin Qubits in Solids.” Physical Review Letters 117.17 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
Quantum control of systems plays an important role in modern science and technology. The ultimate goal of quantum control is to achieve high-fidelity universal control in a time-optimal way. Although high-fidelity universal control has been reported in various quantum systems, experimental implementation of time-optimal universal control remains elusive. Here, we report the experimental realization of time-optimal universal control of spin qubits in diamond. By generalizing a recent method for solving quantum brachistochrone equations [X. Wang et al., Phys. Rev. Lett. 114, 170501 (2015)], we obtained accurate minimum-time protocols for multiple qubits with fixed qubit interactions and a constrained control field. Single- and two-qubit time-optimal gates are experimentally implemented with fidelities of 99% obtained via quantum process tomography. Our work provides a time-optimal route to achieve accurate quantum control and unlocks new capabilities for the emerging field of time-optimal control in general quantum systems.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.117.170501
