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Author

Richard R. Allen

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Preprint Jul 2026

Optimal Lower Bounds for Hamiltonian Simulation

This work suggests that for many physical systems, gate count must scale polynomially in $1/\epsilon$, contrary to the complexity suggested by counting coherent oracle queries such as those in the block-encoding model.

Alexander Zlokapa, Richard R. Allen, A. Harrow · 3 citations
Preprint Sep 2026

Quantum thermalization achieves optimal approximate quantum error correction

Quantum thermalization explains how an isolated many-body system naturally evolves towards a thermal state, rendering information about the initial conditions inaccessible to local measurements. This is precisely the mechanism utilized in quantum error correction, where information is protected by design through a nonl...

Aditi Venkatesh, Richard R. Allen, S. Pilatowsky-Cameo et al. · 2 citations

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