6 papers
Provably Efficient Self-Calibrating Quantum Fault Tolerance
Weiyuan Gong, Hong-Ye Hu
Quantum error correction protects logical information only when every physical operation remains below the fault-tolerance threshold, a condition that must be maintained continuous…
Characterizing Arbitrary Lindbladian Dynamics with a Few Pauli Measurements
Taiqi Zhou, Weiyuan Gong
Quantum devices are open systems whose dynamics interleave coherent evolution with dissipation, and benchmarking, error mitigation, and error correction all rest on a faithful mode…
Optimal Ansatz-free Hamiltonian Learning In Situ
Taiqi Zhou, Weiyuan Gong
Characterizing the features of a Hamiltonian that governs a quantum system serves as a fundamental subroutine of quantum device calibration, signal sensing, and error correction. R…
Learning Arbitrary Lindbladians with Quantum Error Correction
Nikita Romanov, Petr Ivashkov, Weiyuan Gong +4
We study ansatz-free Lindbladian learning, the problem of reconstructing the generator of an open quantum system without prior knowledge of its Hamiltonian or dissipator structures…
Time-Dependent Low-Energy Simulation Accelerates Adiabatic State Preparation
Shuo Zhou, Zhaokai Pan, Weiyuan Gong +1
Hamiltonian simulations are key subroutines in adiabatic quantum computation and quantum many-body physics, where quantum dynamics often happen in the low-energy sector. Previous s…
Instance-Optimal Matrix Multiplicative Weight Update and Its Quantum Applications
Weiyuan Gong, Tongyang Li, Xinzhao Wang +1
The Matrix Multiplicative Weight Update (MMWU) is a seminal online learning algorithm with numerous applications. Applied to the matrix version of the Learning from Expert Advice (…