Author

Ying-Zhou Li

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Preprint Oct 2026

Efficient quantum phase estimation with adaptive entanglement-assisted Hadamard test

The entanglement-assisted Hadamard test (EHT) is a practical method for estimating a quantum phase by amplifying the phase signal. However, the feasible amplification is fundamentally limited by the accuracy of the reference phase, such that the method is inefficient in the high-precision regime. In this work, we propo...

Heng-Zhun Chen, Ben-Chi Zhao, Ying-Zhou Li · 0 citations

Preprint Sep 2026

Virtual quantum neural networks

This work extends the notion of quantum neural network, using random sampling and classical data processing to enlarge the optimization space in a way that includes linear combinations of completely positive maps and leverages its enlarged optimization space to achieve increased expressivity and improved noise robustne...

Ben-Chi Zhao, Xuanqiang Zhao, Yi-Nan Li et al. · 0 citations