Prof. Antonio Mezzacapo, Neural-network fermionic states: precise measurements on quantum computers and variational Monte Carlo

by Prof. Antonio Mezzacapo (Research staff member IBM T.J. Watson Research Center. NY)

Wednesday 5 Feb 2020, 14:30 → 15:30 Europe/Rome

1G09 (Dipartimento di Fisica)

In the first part of this talk I will introduce neural-network estimators for quantum observables, obtained by integrating the measurement apparatus of a quantum simulator with neural networks. Unsupervised learning of single-qubit measurement data can produce estimates of complex observables free of quantum noise. Precise estimates are achieved for quantum chemistry Hamiltonians, with a reduction of several orders of magnitude in the amount of measurements needed compared to standard estimators. I will show results on molecular systems obtained using IBM superconducting quantum processors. In the second part, I will show how the integration of quantum information and machine learning techniques allows to improve on classical coupled-cluster methods for some diatomic molecules.