2 papers
quant-ph2024
Error convergence of quantum linear system solvers
Matias Ginzburg, Ugo Marzolino
We analyze the performance of the Harrow-Hassidim-Lloyd algorithm (HHL algorithm) for solving linear problems and of a variant of this algorithm (HHL variant) commonly encountered…
quant-ph2024
Precision magnetometry exploiting excited state quantum phase transitions
Qian Wang, Ugo Marzolino
Critical behaviour in phase transitions is a resource for enhanced precision metrology. The reason is that the function, known as Fisher information, is superextensive at critical…