Author

J. LeBlanc

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Preprint Aug 2026

Variationally Optimized Imaginary-time Polynomial Filters for Ground State Projection

In this work, we develop a variational imaginary-time evolution (ITE) framework based on polynomial filtering, derived from an operator-level action principle, which yields an optimized non-unitary projector expressed as a polynomial in the Hamiltonian. Starting from a single-ancilla, first-order imaginary-time update...

B. Seifi, I. Assi, J. LeBlanc · 0 citations

Preprint Jul 2026

A Variational Framework for Time-Dependent Quantum Systems with Applications to Floquet Hamiltonians

We introduce a variational framework for approximating the time-evolution operator $\hat{U}(t)$ within a physically motivated operator manifold, reformulating quantum dynamics as a tractable problem in operator space using stationary action principle. For periodically driven systems, the resulting approximate evolution...

I. Assi, Meenu Kumari, J. LeBlanc · 0 citations