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Circuit quantum electrodynamics with a quadruple quantum dot |
| Ting Lin(林霆)1,2, Hai-Ou Li(李海欧)1,2, Gang Cao(曹刚)1,2,†, and Guo-Ping Guo(郭国平)1,2,3 |
1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3 Origin Quantum Computing Company Limited, Hefei 230088, China |
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Abstract In this theoretical work, we describe a mechanism for the coupling between a plane structure consisting of four quantum dots and a resonator. We systematically study the dependence of the quadruple coupling strength and the qubit decoherence rate and point out the optimized operating position of the hybrid system. According to the transmission given by the input-output theory, the signatures in the resonator spectrum are predicted. Furthermore, based on the parameters already achieved in previous works, we prove that the device described in this paper can achieve the strong coupling limit, i.e., this approach can be used for system extension under the existing technical conditions. Our results show an effective and promotable approach to couple quantum dot structures in plane with the resonator and propose a meaningful extension method.
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Received: 14 February 2023
Revised: 31 March 2023
Accepted manuscript online: 17 April 2023
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PACS:
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73.21.La
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(Quantum dots)
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03.67.Lx
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(Quantum computation architectures and implementations)
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42.50.Wk
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(Mechanical effects of light on material media, microstructures and particles)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 92265113, 12074368, and 12034018). |
Corresponding Authors:
Gang Cao
E-mail: gcao@ustc.edu.cn
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Cite this article:
Ting Lin(林霆), Hai-Ou Li(李海欧), Gang Cao(曹刚), and Guo-Ping Guo(郭国平) Circuit quantum electrodynamics with a quadruple quantum dot 2023 Chin. Phys. B 32 070307
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