114 citations · 612 across the 31 of their papers we have counts for
32 papers
High-fidelity geometric quantum gates exceeding 99.9% in germanium quantum dots
Yu-Chen Zhou, Rong-Long Ma, Zhenzhen Kong +11
Achieving high-fidelity and robust qubit manipulations is a crucial requirement for realizing faulttolerant quantum computation. Here, we demonstrate a single-hole spin qubit in a…
In-plane optimal qubit operation with control fidelities exceeding 99 %
Yu-Chen Zhou, Zhenzhen Kong, Rong-Long Ma +9
Hole spin qubits based on semiconductor quantum dots are promising for building future large-scale quantum computers owing to their all-electrical manipulation. However, abundant p…
On-chip Parametric Amplification in a Double Quantum Dots Circuit
Yong-Qiang Xu, Rui Wu, Si-Si Gu +8
In microwave-based quantum circuits, including double quantum dots (DQDs), superconducting qubits and spin qubits, parametric amplifiers are indispensable in achieving high-fidelit…
Cryogenic interface-state filling and tunneling mechanisms in strained Ge/SiGe heterostructures
Jingrui Ma, Yuan Kang, Rui Wu +11
Traps at the semiconductor-oxide interface are considered as a major source of instability in strained Ge/SiGe quantum devices, yet the quantified study of their cryogenic behavior…
Electric-field independent spin-orbit coupling gap in hBN-encapsulated bilayer graphene
Fang-Ming Jing, Zhen-Xiong Shen, Guo-Quan Qin +8
The weak spin-orbit coupling (SOC) in bilayer graphene (BLG) is essential for encoding spin qubits while bringing technical challenges for extracting the opened small SOC gap Δ_SO…
Switching spin filling sequence in a bilayer graphene quantum dot through trigonal warping
Guo-Quan Qin, Fang-Ming Jing, Tian-Yue Hao +5
We demonstrate a switchable electron shell structure in a bilayer graphene quantum dot by manipulating the trigonal warping effect upon electrical gating. Under a small perpendicul…
Revealing spin-flip two-level systems using ultra-thin film superconducting resonators
Zi-Qing Huang, Shu-Kun Ye, Yong-Qiang Xu +8
Material disorders are one of the major sources of noise and loss in solid-state quantum devices, whose behaviors are often modeled as two-level systems (TLSs) formed by charge tun…
Chip-to-chip quantum photonic controlled-NOT gate teleportation
Lan-Tian Feng, Ming Zhang, Di Liu +7
Quantum networks provide a novel framework for quantum information processing, significantly enhancing system capacity through the interconnection of modular quantum nodes. Beyond…
High Mobility SiGe/Ge 2DHG Heterostructure Quantum Wells for Semiconductor Hole Spin Qubits
Zhenzhen Kong, Zonghu Li, Yuchen Zhou +11
Strong spin-orbit coupling and relatively weak hyperfine interactions make germanium hole spin qubits a promising candidate for semiconductor quantum processors. The two-dimensiona…
Highly tunable 2D silicon quantum dot array with coupling beyond nearest neighbors
Ning Wang, Jia-Min Kang, Wen-Long Lu +6
Scaling up quantum dots to two-dimensional (2D) arrays is a crucial step for advancing semiconductor quantum computation. However, maintaining excellent tunability of quantum dot p…
Pursuing high-fidelity control of spin qubits in natural Si/SiGe quantum dot
Ning Wang, Shao-Min Wang, Run-Ze Zhang +6
Electron spin qubits in silicon are a promising platform for fault-tolerant quantum computing. Low-frequency noise, including nuclear spin fluctuations and charge noise, is a prima…
A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
Ming Ni, Rong-Long Ma, Zhen-Zhen Kong +11
To realize large-scale quantum information processes, an ideal scheme for two-qubit operations should enable diverse operations with given hardware and physical interaction. Howeve…
Ultrafast switchable spin-orbit coupling for silicon spin qubits via spin valves
Ranran Cai, Fang-Ge Li, Bao-Chuan Wang +3
Recent experimental breakthroughs, particularly for single-qubit and two-qubit gates exceeding the error correction threshold, highlight silicon spin qubits as leading candidates f…
Coupling of hole double quantum dot in planar germanium to a microwave cavity
Yuan Kang, Zong-Hu Li, Zhen-Zhen Kong +10
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 approa…
A SWAP Gate for Spin Qubits in Silicon
Ming Ni, Rong-Long Ma, Zhen-Zhen Kong +13
With one- and two-qubit gate fidelities approaching the fault-tolerance threshold for spin qubits in silicon, how to scale up the architecture and make large arrays of spin qubits…
Single spin qubit geometric gate in a silicon quantum dot
Rong-Long Ma, Ao-Ran Li, Chu Wang +11
Preserving qubit coherence and maintaining high-fidelity qubit control under complex noise environment is an enduring challenge for scalable quantum computing. Here we demonstrate…
Singlet-triplet-state readout in silicon-metal-oxide-semiconductor double quantum dots
Rong-Long Ma, Sheng-Kai Zhu, Zhen-Zhen Kong +9
High-fidelity singlet-triplet state readout is essential for large-scale quantum computing. However, the widely used threshold method of comparing a mean value with the fixed thres…
Correcting on-chip distortion of control pulses with silicon spin qubits
Ming Ni, Rong-Long Ma, Zhen-Zhen Kong +10
Pulse distortion, as one of the coherent error sources, hinders the characterization and control of qubits. In the semiconductor quantum dot system, the distortions on measurement…
Threshold-independent method for single-shot readout of spin qubits in semiconductor quantum dots
Rui-Zi Hu, Sheng-Kai Zhu, Xin Zhang +8
The single-shot readout data process is essential for the realization of high-fidelity qubits and fault-tolerant quantum algorithms in semiconductor quantum dots. However, the fide…
Floquet state depletion in ac-driven circuit QED
Ming-Bo Chen, Bao-Chuan Wang, Sigmund Kohler +9
We perform Floquet spectroscopy in a GaAs double quantum dot system coupled to a high-impedance superconducting resonator. By applying microwave induced consecutive passages under…
Generation of multiphoton entangled quantum states with a single silicon nanowire
Ming Zhang, Lan-Tian Feng, Zhi-Yuan Zhou +7
Multiphoton entanglement plays a critical role in quantum information processing, and greatly improves our fundamental understanding of the quantum world. Despite tremendous effort…
Temperature dependence of Coulomb oscillations in a few-layer two-dimensional WS2 quantum dot
Xiang-Xiang Song, Zhuo-Zhi Zhang, Jie You +5
Standard semiconductor fabrication techniques are used to fabricate a quantum dot (QD) made of WS2, where Coulomb oscillations were found. The full-width-at-half-maximum of the Cou…
Tunable Hybrid Qubit in a GaAs Double Quantum Dot
Gang Cao, Hai-Ou Li, Guo-Dong Yu +8
We experimentally demonstrate a tunable hybrid qubit in a five-electron GaAs double quantum dot. The qubit is encoded in the (1,4) charge regime of the double dot and can be manipu…
Kondo induced π-phase shift of microwave photons in a circuit quantum electrodynamics architecture
Guang-Wei Deng, Loic Henriet, Da Wei +7
Mesoscopic systems constitute appealing platforms to study many-body physics with light and matter degrees of freedom. The Kondo effect refers to the screening of a spin-1/2 impuri…