Author

Yupan Liu

École Polytechnique Fédérale de Lausanne

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Preprint Sep 2026

On quantum interactive proofs with a laconic prover

Interactive proof systems with a laconic prover, studied by Goldreich, Vadhan, and Wigderson (CC, 2002), capture problems verifiable with logarithmic prover communication in the classical setting. For two-message quantum analogs, even a single-bit prover response contains quantum statistical zero-knowledge ($\sf QSZK$)...

Zi-Han Hu, Yupan Liu · 0 citations

Preprint Aug 2026

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

An optimal estimator is established under the sole promise that one of the two states is pure, without knowing which one, under the sole promise of which state is pure.

Yupan Liu, Qisheng Wang · 1 citation