Coupling of hole double quantum dot in planar germanium to a microwave cavity

In recent years, notable progress has been made in the study of hole qubits in planar germanium, and circuit quantum electrodynamics (circuit QED) has emerged as a promising approach for achieving long-range coupling and scaling up of qubits. Here, we demonstrate the coupling between holes in a plan...

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Bibliographic Details
Published in:arXiv.org 2023-10
Main Authors: Kang, Yuan, Zong-Hu, Li, Zhen-Zhen Kong, Fang-Ge, Li, Tian-Yue, Hao, Ze-Cheng, Wei, Song-Yan, Deng, Bao-Chuan Wang, Hai-Ou, Li, Gui-Lei, Wang, Guo, Guang-Can, Cao, Gang, Guo-Ping, Guo
Format: Article
Language:English
Subjects:
Circuits
Coupling
Germanium
Hybrid systems
Parameters
Photons
Quantum dots
Quantum electrodynamics
Qubits (quantum computing)
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Summary:In recent years, notable progress has been made in the study of hole qubits in planar germanium, and circuit quantum electrodynamics (circuit QED) has emerged as a promising approach for achieving long-range coupling and scaling up of qubits. Here, we demonstrate the coupling between holes in a planar germanium double quantum dot (DQD) and photons in a microwave cavity. Specifically, a real-time calibrated virtual gate method is developed to characterize this hybrid system, which in turn allows us to determine the typical parameters sequentially through single-parameter fitting instead of conventional multi-parameter fitting with additional uncertainty, and gives the hole-photon coupling rate of \(g_0/2\pi\) = 21.7 MHz. This work is a step toward further research on hole-photon interactions and long-range qubit coupling in planar germanium. The experimental method developed in this work contributes to the more accurate and efficient characterization of hybrid cavity-QED systems.
ISSN:2331-8422
DOI:10.48550/arxiv.2310.08145