Refereed journal article or data article (A1)

Quantum steering on IBM quantum processors




List of Authors: Seifert Lennart Maximilian, Beyer Konstantin, Luoma Kimmo, Strunz Walter T

Publisher: American Physical Society

Publication year: 2022

Journal: Physical Review A

Journal name in source: Physical Review A

Volume number: 105

Issue number: 4

eISSN: 2469-9934

DOI: http://dx.doi.org/10.1103/PhysRevA.105.042413

URL: https://doi.org/10.1103/PhysRevA.105.042413

Self-archived copy’s web address: https://arxiv.org/abs/2111.00074


Abstract

We use contemporary quantum computers to experimentally investigate quantum steering of an open quantum system by measurements on its environment. On three IBM quantum processors we distinguish a qubit as the open system and perform pairwise interactions with multiple environment ancillas, following a collision model approach. Different measurement strategies on the ancillas lead to different state ensembles of the open system, which are reconstructed by employing state tomography. The amount of steering within the resulting assemblages is quantified with the help of a semidefinite program. We successfully observe the presence of quantum steering in our experimental simulations and can discriminate the different performance qualities and noise levels of the selected quantum devices.


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Last updated on 2022-19-05 at 07:56