Yangsen Ye
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View article: Low-overhead defect-adaptive surface code with bandage-like super-stabilizers
Low-overhead defect-adaptive surface code with bandage-like super-stabilizers Open
To make practical quantum algorithms work, large-scale quantum processors protected by error-correcting codes are required to resist noise and ensure reliable computational outcomes. However, a major challenge arises from defects in proces…
View article: Logical Magic State Preparation with Fidelity Beyond the Distillation Threshold on a Superconducting Quantum Processor
Logical Magic State Preparation with Fidelity Beyond the Distillation Threshold on a Superconducting Quantum Processor Open
Fault-tolerant quantum computing based on surface code has emerged as an attractive candidate for practical large-scale quantum computers to achieve robust noise resistance. To achieve universality, magic states preparation is a commonly a…
View article: Experimental quantum computational chemistry with optimised unitary coupled cluster ansatz
Experimental quantum computational chemistry with optimised unitary coupled cluster ansatz Open
Quantum computational chemistry has emerged as an important application of quantum computing. Hybrid quantum-classical computing methods, such as variational quantum eigensolvers (VQE), have been designed as promising solutions to quantum …
View article: Observation of Thermalization and Information Scrambling in a Superconducting Quantum Processor
Observation of Thermalization and Information Scrambling in a Superconducting Quantum Processor Open
Understanding various phenomena in nonequilibrium dynamics of closed quantum many-body systems, such as quantum thermalization, information scrambling, and nonergodic dynamics, is crucial for modern physics. Using a ladder-type superconduc…
View article: Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler
Realization of Fast All-Microwave Controlled-Z Gates with a Tunable Coupler Open
The development of high-fidelity two-qubit quantum gates is essential for digital quantum computing. Here, we propose and realize an all-microwave parametric controlled-Z (CZ) gates by coupling strength modulation in a superconducting Tran…
View article: Floquet prethermal phase protected by U(1) symmetry on a superconducting quantum processor
Floquet prethermal phase protected by U(1) symmetry on a superconducting quantum processor Open
Periodically driven systems, or Floquet systems, exhibit many novel dynamics\nand interesting out-of-equilibrium phases of matter. Those phases arising with\nthe quantum systems' symmetries, such as global $U(1)$ symmetry, can even show\nd…
View article: Strong Quantum Computational Advantage Using a Superconducting Quantum Processor
Strong Quantum Computational Advantage Using a Superconducting Quantum Processor Open
Scaling up to a large number of qubits with high-precision control is essential in the demonstrations of quantum computational advantage to exponentially outpace the classical hardware and algorithmic improvements. Here, we develop a two-d…
View article: Realization of high-fidelity CZ gates in extensible superconducting qubits design with a tunable coupler
Realization of high-fidelity CZ gates in extensible superconducting qubits design with a tunable coupler Open
High-fidelity two-qubits gates are essential for the realization of large-scale quantum computation and simulation. Tunable coupler design is used to reduce the problem of parasitic coupling and frequency crowding in many-qubit systems and…
View article: Quantum Computational Advantage via 60-Qubit 24-Cycle Random Circuit Sampling
Quantum Computational Advantage via 60-Qubit 24-Cycle Random Circuit Sampling Open
To ensure a long-term quantum computational advantage, the quantum hardware should be upgraded to withstand the competition of continuously improved classical algorithms and hardwares. Here, we demonstrate a superconducting quantum computi…
View article: Observation of Strong and Weak Thermalization in a Superconducting Quantum Processor
Observation of Strong and Weak Thermalization in a Superconducting Quantum Processor Open
We experimentally study the ergodic dynamics of a 1D array of 12 superconducting qubits with a transverse field, and identify the regimes of strong and weak thermalization with different initial states. We observe convergence of the local …
View article: Observation of strong and weak thermalization in a superconducting\n quantum processor
Observation of strong and weak thermalization in a superconducting\n quantum processor Open
We experimentally study the ergodic dynamics of a 1D array of 12\nsuperconducting qubits with a transverse field, and identify the regimes of\nstrong and weak thermalization with different initial states. We observe\nconvergence of the loc…
View article: Observation of thermalization and information scrambling in a superconducting quantum processor
Observation of thermalization and information scrambling in a superconducting quantum processor Open
Understanding various phenomena in non-equilibrium dynamics of closed quantum many-body systems, such as quantum thermalization, information scrambling, and nonergodic dynamics, is a crucial for modern physics. Using a ladder-type supercon…
View article: Ergodic-Localized Junctions in a Periodically Driven Spin Chain
Ergodic-Localized Junctions in a Periodically Driven Spin Chain Open
We report the analog simulation of an ergodic-localized junction by using an array of 12 coupled superconducting qubits. To perform the simulation, we fabricated a superconducting quantum processor that is divided into two domains: one is …