385 citations · 942 across the 21 of their papers we have counts for
21 papers
First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity
SHANHE Collaboration, Zhenxing Tang, Bo Wang +16
Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. We report the first use of a…
Performing SU() operations and rudimentary algorithms in a superconducting transmon qudit for and
Pei Liu, Ruixia Wang, Jing-Ning Zhang +11
Quantum computation architecture based on -level systems, or qudits, has attracted considerable attention recently due to their enlarged Hilbert space. Extensive theoretical and…
Error per single-qubit gate below in a superconducting qubit
Zhiyuan Li, Pei Liu, Peng Zhao +10
Implementing arbitrary single-qubit gates with near perfect fidelity is among the most fundamental requirements in gate-based quantum information processing. In this work, we fabri…
Mapping Topology-Localization Phase Diagram with Quasiperiodic Disorder Using a Programmable Superconducting Simulator
Xuegang Li, Huikai Xu, Junhua Wang +23
We explore topology-localization phase diagram by simulating one-dimensional Su-Schrieffer-Heeger (SSH) model with quasiperiodic disorder using a programmable superconducting simul…
Baseband control of superconducting qubits with shared microwave drives
Peng Zhao, Ruixia Wang, Mengjun Hu +4
Accurate control of qubits is the central requirement for building functional quantum processors. For the current superconducting quantum processor, high-fidelity control of qubits…
Control and mitigation of microwave crosstalk effect with superconducting qubits
Ruixia Wang, Peng Zhao, Yirong Jin +1
Improving gate performance is vital for scalable quantum computing. The universal quantum computing also requires the gate fidelity to reach a high level. For superconducting quant…
Spurious microwave crosstalk in floating superconducting circuits
Peng Zhao, Yingshan Zhang, Xuegang Li +5
Crosstalk is a major concern in the implementation of large-scale quantum computation since it can degrade the performance of qubit addressing and cause gate errors. Finding the or…
Combating fluctuations in relaxation times of fixed-frequency transmon qubits with microwave-dressed states
Peng Zhao, Teng Ma, Yirong Jin +1
With the long coherence time, the fixed-frequency transmon qubit is a promising qubit modality for quantum computing. Currently, diverse qubit architectures that utilize fixed-freq…
Quantum circuit architecture search on a superconducting processor
Kehuan Linghu, Yang Qian, Ruixia Wang +14
Variational quantum algorithms (VQAs) have shown strong evidences to gain provable computational advantages for diverse fields such as finance, machine learning, and chemistry. How…
Tunable coupling of widely separated superconducting qubits: A possible application towards a modular quantum device
Peng Zhao, Yingshan Zhang, Guangming Xue +2
Besides striving to assemble more and more qubits in a single monolithic quantum device, taking a modular design strategy may mitigate numerous engineering challenges for achieving…
Quantum crosstalk analysis for simultaneous gate operations on superconducting qubits
Peng Zhao, Kehuan Linghu, Zhiyuan Li +5
Maintaining or even improving gate performance with growing numbers of parallel controlled qubits is a vital requirement for fault-tolerant quantum computing. For superconducting q…
Realizing discrete time crystal in an one-dimensional superconducting qubit chain
Huikai Xu, Jingning Zhang, Jiaxiu Han +5
Floquet engineering, i.e. driving the system with periodic Hamiltonians, not only provides great flexibility in analog quantum simulation, but also supports phase structures of gre…
Vacuum-gap transmon qubits realized using flip-chip technology
Xuegang Li, Yingshan Zhang, Chuhong Yang +26
Significant progress has been made in building large-scale superconducting quantum processors based on flip-chip technology. In this work, we use the flip-chip technology to realiz…
Transmon qubit with relaxation time exceeding 0.5 milliseconds
Chenlu Wang, Xuegang Li, Huikai Xu +25
By using the dry etching process of tantalum (Ta) film, we had obtained transmon qubit with the best lifetime (T1) 503 us, suggesting that the dry etching process can be adopted in…
Realisation of adiabatic and diabatic CZ gates in superconducting qubits coupled with a tunable coupler
Huikai Xu, Weiyang Liu, Zhiyuan Li +11
High fidelity two-qubit gates are fundamental for scaling up the superconducting number. We use two qubits coupled via a frequency-tunable coupler which can adjust the coupling str…
Characterize noise correlation and enhance coherence via qubit motion
Jiaxiu Han, Zhiyuan Li, Jingning Zhang +11
The identification of spacial noise correlation is of critical importance in developing error-corrected quantum devices, but it has barely been studied so far. In this work, we uti…
Observation of Bloch Oscillations and Wannier-Stark Localization on a Superconducting Processor
Xue-Yi Guo, Zi-Yong Ge, Hekang Li +9
The Bloch oscillation (BO) and Wannier-Stark localization (WSL) are fundamental concepts about metal-insulator transitions in condensed matter physics. These phenomena have also be…
Observation of dynamical quantum phase transition by a superconducting qubit simulation
Xue-Yi Guo, Chao Yang, Yu Zeng +7
A dynamical quantum phase transition can occur during time evolution of sudden quenched quantum systems across a phase transition. It corresponds to the nonanalytic behavior at a c…
Demonstration of irreversibility and dissipation relation of thermodynamics with a superconducting qubit
Xue-Yi Guo, Yi Peng, Changnan Peng +6
We investigate experimentally the relation between thermodynamical irreversibility and dissipation on a superconducting Xmon qubit. This relation also implies the second law and th…
High Quality Stepped-Impedance Resonators Suitable for Circuit-QED Measurement of Superconducting Artificial Atoms
Yirong Jin, Hui Deng, Xueyi Guo +4
High quality factor coplanar resonators are critical elements in superconducting quantum circuits. We describe the design, fabrication and measurement of stepped impedance resonato…
Fabrication of superconducting nanowires based on ultra-thin Nb films by means of nanoimprint lithography
Lu Zhao, Yirong Jin, Jie Li +5
Nanoimprint lithography (NIL) is an attractive nonconventional lithographic technique in the fabrication of superconducting nanowires for superconducting nanowire single-photon det…