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quant-ph2024
A differentiable quantum phase estimation algorithm
Davide Castaldo, Soran Jahangiri, Agostino Migliore +2
The simulation of electronic properties is a pivotal issue in modern electronic structure theory, driving significant efforts over the past decades to develop protocols for computi…
quant-ph2023
Hermitian and unitary almost-companion matrices of polynomials on demand
L. A. Markovich, A. Migliore, A. Messina
We introduce the concept of Almost-Companion Matrix (ACM) by relaxing the non-derogatory property of the standard Companion Matrix (CM). That is, we define an ACM as a matrix whose…
quant-ph2020
New approach to describe two coupled spins in a variable magnetic field
Yuri Belousov, Roberto Grimaudo, Antonino Messina +2
We propose a method to describe the evolution of two spins coupled by hyperfine interaction in an external time-dependent magnetic field. We apply the approach to the case of hyper…