7 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 Î_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…