Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

QI: Fachverband Quanteninformation

QI 15: Quantum Information: Concepts and Methods II

QI 15.7: Hauptvortrag

Donnerstag, 12. März 2026, 11:30–12:00, BEY/0137

Robust shadow tomography: from quantum simulation to high-energy physics — •Hai-Chau Nguyen — University of Siegen, Siegen, Germany

Starting with a brief introduction to shadow tomography, we show that it can be reformulated in terms of generalised measurements. On the one hand, this allows for taking into account the measurement errors in the implementation of shadow tomography in a canonical way. On the other hand, the symmetry of a shadow tomography protocol can be investigated in parallel with the symmetry of its associated generalised measurement, revealing its robustness against even complex measurement noise. We then show that measurement errors in shadow tomography can be efficiently mitigated even when they are correlated. This can be achieved by effectively symmetrising the shadow tomography protocol through simple controlled randomised (qu)bit flips, which provides a simple and robust protocol in comparison to those that are more demanding, such as protocols based on sampling Clifford gates. While the theory of shadow tomography and its technical developments were motivated by applications in quantum simulators, we emphasise its more general conceptual implications. In particular, we demonstrate a natural application of shadow tomography in the characterisation of relativistic spin-spin correlations of output particles in high-energy physics experiments. As a concrete example, we discuss how shadow tomography can shed light on conceptual aspects of the recent experiments demonstrating top-quark entanglement at ATLAS and CMS.

Keywords: shadow tomography; measurement noise; quantum simulation; high energy physics