Qian Chen

activity

20242026

most citedSymmetry reduction for testing

k

-block-positivity via extendibility

64 citations · 64 across the 5 of their papers we have counts for

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2 papers · 1 filter

quant-ph2025★ 64 cited

Symmetry reduction for testing $k$ -block-positivity via extendibility

Qian Chen, Benoît Collins, Omar Fawzi

We study the problem of testing $k$ -block-positivity via symmetric $N$ -extendibility by taking the tensor product with a $k$ -dimensional maximally entangled state. We exploit the u…

math.GT2025

Fields of definition for triangle groups as Fuchsian groups

Frank Calegari, Qiankang Chen

The compact hyperbolic triangle group $Δ (p, q, r)$ admits a canonical representation to $PSL_{2} (R)$ with discrete image which is unique up to conjugation. The trace…

Symmetry reduction for testing k-block-positivity via extendibility

Fields of definition for triangle groups as Fuchsian groups

Symmetry reduction for testing $k$ -block-positivity via extendibility