Yuhan Liu

activity

20242026

most citedQuantum state testing with restricted measurements

1 citations · 1 across the 3 of their papers we have counts for

collaborators

Showing quant-phShow all

4 papers · 1 filter

quant-ph2026

Quantum Mixedness Testing with Pauli Measurements

Jayadev Acharya, Abhilash Dharmavarapu, Yuhan Liu +1

We consider a fundamental problem of \emph{mixedness testing}: Given $n$ copies of an $N$ -qubit state $ρ$ , determine whether $ρ = I_{d} / d$ or $\|ρ-\mathbb{I}_d/d\|_1 \geq \va…

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 $Ω (\frac{1 0 ^{N}}{N ε ^{2}})$ 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 $n$ copies of an unknown $N$ -qubit state $ρ \in C^{d \times d}, d = 2^{N}$ , the goal is to learn th…

quant-ph2024★ 1 cited

Quantum state testing with restricted measurements

Yuhan Liu, Jayadev Acharya

We study quantum state testing where the goal is to test whether $ρ = ρ_{0} \in C^{d \times d}$ or $∥ ρ - ρ_{0} ∥_{1} > ε$ , given $n$ copies of $ρ$ and a known state descriptio…