175 citations · 1.1k across the 38 of their papers we have counts for
38 papers
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…
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…
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…
Ultrafast and Electrically Tunable Rabi Frequency in a Germanium Hut Wire Hole Spin Qubit
He Liu, Ke Wang, Fei Gao +9
Hole spin qubits based on germanium (Ge) have strong tunable spin orbit interaction (SOI) and ultrafast qubit operation speed. Here we report that the Rabi frequency (f_Rabi) of a…
Probing two driven double quantum dots strongly coupled to a cavity
Si-Si Gu, Sigmund Kohler, Yong-Qiang Xu +8
We experimentally and theoretically study a driven hybrid circuit quantum electrodynamics (cQED) system beyond the dispersive coupling regime. Treating the cavity as part of the dr…
Quantum Interference and Coherent Population Trapping in a Double Quantum Dot
Yuan Zhou, Ke Wang, He Liu +5
Quantum interference is a natural consequence of wave-particle duality in quantum mechanics, and is widely observed at the atomic scale. One interesting manifestation of quantum in…
Flopping-mode spin qubit in a Si-MOS quantum dot
Rui-Zi Hu, Rong-Long Ma, Ming Ni +8
Spin qubits based on silicon metal-oxide semiconductor (Si-MOS) quantum dots (QDs) are promising platforms for large-scale quantum computers. To control spin qubits in QDs, electri…
An automated approach for consecutive tuning of quantum dot arrays
Hanwei Liu, Baochuan Wang, Ning Wang +5
Recent progress has shown that the dramatically increased number of parameters has become a major issue in tuning of multi-quantum dot devices. The complicated interactions between…
Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
He Liu, Ting Zhang, Ke Wang +10
Hole spins confined in semiconductor quantum dot systems have gained considerable interest for their strong spin-orbit interactions (SOIs) and relatively weak hyperfine interaction…
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…
Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
Fang-Ming Jing, Zhuo-Zhi Zhang, Guo-Quan Qin +5
Two-dimensional (2D) materials are a family of layered materials exhibiting rich exotic phenomena, such as valley-contrasting physics. Down to single-particle level, unraveling fun…
Undoped Strained Ge Quantum Well with Ultrahigh Mobility Grown by Reduce Pressure Chemical Vapor Deposition
Zhenzhen Kong, Zonghu Li, Gang Cao +15
We fabricate an undoped Ge quantum well under 30 nm Ge0.8Si0.2 shallow barrier with reverse grading technology. The under barrier is deposited by Ge0.8Si0.2 followed by Ge0.9Si0.1…
Full tunability and quantum coherent dynamics of a driven multilevel system
Yuan Zhou, Sisi Gu, Ke Wang +5
Tunability of an artificial quantum system is crucial to its capability to process quantum information. However, tunability usually poses significant demand on the design and fabri…
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…