Quantum steering on IBM quantum processors

Research output: Contribution to journalResearch articleContributedpeer-review



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.


Original languageEnglish
Article number042413
Pages (from-to)1-10
Number of pages10
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
Publication statusPublished - 1 Apr 2022

External IDs

Scopus 85128376244
Mendeley 322e60de-615d-38b3-9742-edf49a4a918e
ORCID /0000-0002-7806-3525/work/142234202
ORCID /0000-0002-1864-4520/work/142234863


DFG Classification of Subject Areas according to Review Boards


  • Quantum Steering, quantum computers

Library keywords