3 papers
quant-ph2026
Establishing Mixed-State Phase Equivalence beyond Renormalization Fixed Points
Yuhan Liu
Understanding mixed-state quantum phases is a central challenge in the era of quantum simulation, where many existing studies focus on renormalization fixed points. In this work, w…
quant-ph2025
Pauli Measurements Are Near-Optimal for Single-Qubit Tomography
Jayadev Acharya, Abhilash Dharmavarapu, Yuhan Liu +1
We provide the first non-trivial lower bounds for single-qubit tomography algorithms and show that at least copies are required…
quant-ph2025
Pauli measurements are not optimal for single-copy tomography
Jayadev Acharya, Abhilash Dharmavarapu, Yuhan Liu +1
Quantum state tomography is a fundamental problem in quantum computing. Given copies of an unknown -qubit state , the goal is to learn t…