129 citations · 248 across the 11 of their papers we have counts for
11 papers
Energy relaxation via quantum thermalization: A superconducting qubit coupled to an interacting many-body two-level system
Xue-Yi Guo
Two-level systems (TLS) are widely recognized as a dominant source of energy relaxation in superconducting qubits, limiting coherence times and device performance. While TLS-induce…
Quantum Acoustics with Superconducting Qubits in the Multimode Transition-Coupling Regime
Li Li, Xinhui Ruan, Si-Lu Zhao +23
Hybrid mechanical-superconducting systems for quantum information processing have attracted significant attention due to their potential applications. In such systems, the weak cou…
Fabrication and Characterization of Impedance-transformed Josephson Parametric Amplifier
Zhengyang Mei, Xiaohui Song, Xueyi Guo +10
In this paper, we introduce a method of using a double-layer resist lift-off process to prepare the capacitor dielectric layer for fabricating impedance-engineered Josephson parame…
Observation of multiple steady states with engineered dissipation
Li Li, Tong Liu, Xue-Yi Guo +8
Simulating the dynamics of open quantum systems is essential in achieving practical quantum computation and understanding novel nonequilibrium behaviors. However, quantum simulatio…
Observation of Emergent Gauge Invariance in a Superconducting Circuit
Zhan Wang, Zi-Yong Ge, Zhongcheng Xiang +8
Lattice gauge theories (LGTs) are one of the most fundamental subjects in many-body physics, and has recently attracted considerable research interests in quantum simulations. Here…
Probing Operator Spreading via Floquet Engineering in a Superconducting Circuit
S. K. Zhao, Zi-Yong Ge, Zhongcheng Xiang +16
Operator spreading, often characterized by out-of-time-order correlators (OTOCs), is one of the central concepts in quantum many-body physics. However, measuring OTOCs is experimen…
Thermal variational quantum simulation on a superconducting quantum processor
Xue-Yi Guo, Shang-Shu Li, Xiao Xiao +10
Solving finite-temperature properties of quantum many-body systems is generally challenging to classical computers due to their high computational complexities. In this article, we…
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…