Author

Jayne Thompson

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Preprint Oct 2026

Optimal query complexity for fractional quantum evolution

Given oracle access to an unknown unitary $U=e^{iH}$ , the fractional query problem asks how many queries are required to implement a noninteger power $U^t=e^{itH}$, $0<t<1$, when the spectrum is separated from the branch cut by a gap $\delta$. Quantum singular value transformation gives an upper bound of $O\!\left(\fr...

A. Liu, Adam Wesolowski, Jayne Thompson et al. · 0 citations

Preprint Sep 2026

Versatile Quantum Machine Learning with an Ultra-low Power Photonic Quantum Reservoir Computer

Integrated photonic microprocessors provide high-bandwidth, massively parallel linear computation, but realizing nonlinear feature maps and temporal memory remain key challenges for machine learning. Conventional approaches rely on active tuning and additional nonlinear elements, increasing architectural complexity and...

Wei Wang, Zan Tang, Meng-Long Fang et al. · 0 citations