We present results on the digital quantum simulations of beam-splitter and squeezing interactions. The bosonic hamiltonians are mapped to qubits and then digitalized in order to implement them in the IBM quantum devices. We use error mitigation and post-selection to achieve high-fidelity digital quantum simulations of single-mode and two-mode interactions, as evidenced -- where possible -- by full tomography of the resulting states. We achieve fidelities above 90 \% in the case of single-mode squeezing with low squeezing values and ranging from 60 \% to 90 \% for large squeezing and in the more complex two-mode interactions.
@article{arxiv.2104.09442,
title = {Digital quantum simulation of beam splitters and squeezing with IBM quantum computers},
author = {Paula Cordero Encinar and Andrés Agustí and Carlos Sabín},
journal= {arXiv preprint arXiv:2104.09442},
year = {2021}
}