175 citations · 1.4k across the 40 of their papers we have counts for
40 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…
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…
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…
Quantum enhanced metrology based on flipping trajectory of cold Rydberg gases
Ya-Jun Wang, Jun Zhang, Zheng-Yuan Zhang +17
The dynamical trajectory of a dissipative Rydberg many-body system could be flipped under a microwave field driving, displaying an enhanced sensitivity. This is because the interse…
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…
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…
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…
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…
Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
Ke Wang, Gang Xu, Fei Gao +13
Operation speed and coherence time are two core measures for the viability of a qubit. Strong spin-orbit interaction (SOI) and relatively weak hyperfine interaction make holes in g…
Giant anisotropy of spin relaxation and spin-valley mixing in a silicon quantum dot
Xin Zhang, Rui-Zi Hu, Hai-Ou Li +11
In silicon quantum dots (QDs), at a certain magnetic field commonly referred to as the "hot spot", the electron spin relaxation rate (T_1^(-1)) can be drastically enhanced due to s…
Tunable parametric amplification of a graphene nanomechanical resonator in the nonlinear regime
Zi-Jia Su, Yue Ying, Xiang-Xiang Song +6
Parametric amplification is widely used in nanoelectro-mechanical systems to enhance the transduced mechanical signals. Although parametric amplification has been studied in differ…
Semiconductor Quantum Computation
Xin Zhang, Hai-Ou Li, Gang Cao +3
Semiconductors, a significant type of material in the information era, are becoming more and more powerful in the field of quantum information. In the last decades, semiconductor q…
64-Qubit Quantum Circuit Simulation
Zhao-Yun Chen, Qi Zhou, Cheng Xue +3
Classical simulations of quantum circuits are limited in both space and time when the qubit count is above 50, the realm where quantum supremacy reigns. However, recently, for the…
A tunable hybrid qubit in a triple quantum dot
Bao-Chuan Wang, Gang Cao, Hai-Ou Li +5
We experimentally demonstrate quantum coherent dynamics of a triple-dot-based multi-electron hybrid qubit. Pulsed experiments show that this system can be conveniently initialized,…
Electrotunable artificial molecules based on van der Waals heterostructures
Zhuo-Zhi Zhang, Xiang-Xiang Song, Gang Luo +9
Quantum confinement has made it possible to detect and manipulate single-electron charge and spin states. The recent focus on two-dimensional (2D) materials has attracted significa…
Coherent phonon Rabi oscillations with a high frequency carbon nanotube phonon cavity
Dong Zhu, Xin-He Wang, Wei-Cheng Kong +10
Phonon-cavity electromechanics allows the manipulation of mechanical oscillations similar to photon-cavity systems. Many advances on this subject have been achieved in various mate…
Parametric strong mode-coupling in carbon nanotube mechanical resonators
Shu-Xiao Li, Dong Zhu, Xin-He Wang +9
Carbon nanotubes (CNTs) have attracted much attention for use in nanomechanical devices because of their exceptional properties, such as large resonant frequencies, low mass, and h…
Controlled Quantum Operations of a Semiconductor Three-Qubit System
Hai-Ou Li, Gang Cao, Guo-Dong Yu +4
The Coulomb interactions between electrons play important roles in coupling multiple qubits in various quantum systems. Here we demonstrate controlled quantum operations of three e…
Spin blockade and coherent dynamics of high-spin states in a three-electron double quantum dot
Bao-Bao Chen, Bao-Chuan Wang, Gang Cao +6
Asymmetry in a three-electron double quantum dot (DQD) allows spin blockade, when spin-3/2 (quadruplet) states and spin-1/2 (doublet) states have different charge configurations. W…
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…
A gate defined quantum dot on the two-dimensional transition metal dichalcogenide semiconductor WSe2
Xiang-Xiang Song, Di Liu, Vahid Mosallanejad +8
Two-dimensional layered materials, such as transition metal dichalcogenides (TMDCs), are promising materials for future electronics owing to their unique electronic properties. Wit…
Coupling two distant double quantum dots to a microwave resonator
Guang-Wei Deng, Da Wei, Shu-Xiao Li +9
With recent advances in the circuit quantum electrodynamics (cQED) architecture, hybrid systems that couple nano-devices to microwave resonators have been developing rapidly. Here…
Fabrication and characterization of an undoped GaAs/AlGaAs quantum dot device
Hai-Ou Li, Gang Cao, Ming Xiao +6
We demonstrate the development of a double quantum dot with an integrated charge sensor fabricated in undoped GaAs/AlGaAs heterostructures using a double top-gated design. Based on…