Fermionic Correlation Functions from Randomized Measurements in Programmable Atomic Quantum Devices

Phys Rev Lett. 2023 Aug 11;131(6):060601. doi: 10.1103/PhysRevLett.131.060601.

Abstract

We provide an efficient randomized measurement protocol to estimate two- and four-point fermionic correlations in ultracold atom experiments. Our approach is based on combining random atomic beam splitter operations, which can be realized with programmable optical landscapes, with high-resolution imaging systems such as quantum gas microscopes. We illustrate our results in the context of the variational quantum eigensolver algorithm for solving quantum chemistry problems.