Author

Kaushika De Silva

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Preprint Sep 2026

From Block-encoding to Generalized Quantum Signal Processing: Principles, Algorithms and Applications

This paper develops techniques from first principles as a unified framework for constructing quantum algorithms based on polynomial transformations and applies this framework to representative applications to highlight design principles and demonstrate how distinct algorithms can be constructed from a unified sequence...

Tal Gurfinkel, Kaushika De Silva, A. Mahasinghe et al. · 0 citations

Preprint Aug 2026

An Exactness Barrier for ZX-Calculus Optimization of Synthesized Clifford+T Circuits

It is proved that the local ZX simplification layer (spider fusion and identity removal) computes exactly the free-product normal form of Z_2 * Z_8, giving exact per-instance compression and, under a calibrated ergodicity hypothesis, a depth-independent limit law confirmed on two independently constructed nets.

Chon-Fai Kam, A. Mahasinghe, Kaushika De Silva et al. · 0 citations

Preprint Aug 2026

Numerical Evaluation of ZX Calculus Optimization for Solovay Kitaev Quantum Circuit Synthesis

A measurement of what diagrammatic post-processing recovers from structural redundancy in the Solovay-Kitaev algorithm, which optimizes for numerical convergence rather than circuit economy, and its output carries structural redundancy that a gate-level compiler cannot see.

Dulari De Silva, A. Mahasinghe, Chon-Fai Kam et al. · 0 citations