Yupan Liu

activity

20192026

most citedSpace-bounded quantum state testing via space-efficient quantum singular value transformation

4 citations · 9 across the 15 of their papers we have counts for

collaborators

Showing 2026Show all

4 papers · 1 filter

quant-ph2026

Optimal fidelity estimation when one state is pure via algorithmic Uhlmann transform

Yupan Liu, Qisheng Wang

The Uhlmann fidelity $F (ρ_{0}, ρ_{1}) = tr ∣ ρ_{0} ρ_{1} ∣$ is one of the most fundamental quantities in quantum information theory for quantifying the closeness betwe…

quant-ph2026

On estimating operator norm distance, with optimal trace distance estimation when one state is pure

Yupan Liu, Qisheng Wang, Zhan Yu

We investigate the computational complexity of estimating the operator norm distance $T_{\infty} (ρ_{0}, ρ_{1})$ , defined via the operator norm $∥ A ∥_{\infty} = σ_{m a x} (A)$ , give…

quant-ph2026

The power of unentanglement without destructive interference

Yupan Liu, Pei Wu

Stoquasticity, originating in sign-problem-free physical systems, gives rise to $StoqMA$ , introduced by Bravyi, Bessen, and Terhal (2006), a quantum-inspired intermediate class…

quant-ph2026

Computational hardness of estimating quantum entropies via binary entropy bounds

Yupan Liu

We investigate the computational hardness of estimating the quantum $α$ -Rényi entropy $S_{α}^{R} (ρ) = \frac{l n Tr ( ρ ^{α} )}{1 - α}$ and the quantum $q$ -Tsallis entropy ${\…