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20242026
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quant-ph2026

Efficient Lindbladian Learning from Constant-Time Pauli Responses

Jiaxing Song, Yukun Zhang, Xiao Yuan +1

The paper presents efficient methods for learning the generator (Lindbladian) of open many‑body quantum systems from short‑time local Pauli response data, resolving coherent‑dissip…

quant-ph2026

Efficient Noisy Quantum State and Process Tomography

Chenyang Li, Shengxin Zhuang, Yukun Zhang +4

Efficiently characterizing large quantum states and processes is a central yet notoriously challenging task in quantum information science, as conventional tomography methods typic…

quant-ph2025

Heisenberg-Limited Quantum Eigenvalue Estimation for Non-normal Matrices

Yukun Zhang, Yusen Wu, Xiao Yuan

Estimating the eigenvalues of non-normal matrices is a foundational problem with far-reaching implications, from modeling non-Hermitian quantum systems to analyzing complex fluid d…

quant-ph2025

Classical Algorithms for Hamiltonian Dynamics Mean Value and Guided Local Hamiltonian Problem

Yusen Wu, Yukun Zhang, Chuan Wang +1

The efficient simulation of quantum dynamics and ground states is a central challenge in physics and a key frontier for quantum advantage. While short-time evolution in one-dimensi…

quant-ph2025

Measuring Less to Learn More: Quadratic Speedup in learning Nonlinear Properties of Quantum Density Matrices

Yukun Zhang, Yusen Wu, You Zhou +1

A fundamental task in quantum information science is to measure nonlinear functionals of quantum states, such as . Intuitively, one expects that computing a $k…

quant-ph2025

Hamiltonian Dynamics Learning: A Scalable Approach to Quantum Process Characterization

Yusen Wu, Yukun Zhang, Chuan Wang +1

Quantum process characterization is a fundamental task in quantum information processing, yet conventional methods, such as quantum process tomography, require prohibitive resource…