Ongoing Research Projects

BeyondC - Quantum Information Systems Beyond Classical Capabilities

Special Research Programme (SFB). Funded by the FWF.

Duration: 01.03.2019-28.02.2027

Project number: F7112/F7115

Diagnostics of quantum devices

This project aims to provide a novel foundation and new practical tools for efficient verification, certification and characterization of large quantum devices. Important steps towards these goals have already been demonstrated within the first four years of the BeyondC project (P12). Our future focus (in close collaboration with the SFB partners) is to develop novel methods for the diagnostics of large quantum systems that achieve: (a) dimension demarcation for low sampling complexity, and (b) small computational and memory cost for the requisite data analysis. The primary objective is to identify those physical situations in which goals (a) and (b) are satisfied. Our theoretical protocols will be designed hand-in-hand with hardware optimization in mind and the ultimate SFB goal of designing and testing verifiable quantum devices.

Information-theoretic foundations of quantum interference

Stand-alone project (Quantum Austria). Funded by the FWF

Duration: 01.06.2023-31.01.2026

Project number: P36994

We plan to develop a theoretical framework that will enable us to explore novel ways in which quantum interference can be used in information processing. Following how Bell's theorem has given us a better understanding of quantum entanglement, we will develop a “black-box” formulation adequate for interference phenomena. Besides providing new insights into the differences between classical and quantum theory, this will lead to the development of new protocols based entirely on quantum interference and are expected to have applications in cryptography and communication.

Local Operations on Quantum Fields

Cluster of Excellence QuantA Core Project.

Duration: 01.10.2023-01.04.2026

In this project, we aim to provide an explicit mathematical formulation of local operations for quantum field theory and quantum gravity. This will be general enough to model measurements of free boson and fermion fields, as well as the quantum fields associated to transtatistical particles: identical particles that are neither bosons nor fermions [arXiv:2306.05919]. We will characterize the set of high-order physical operations (analogs of process matrices), and study to what extent it is compatible with causality. Finally, we will investigate if these results allow us to devise new quantum information protocols involving separate parties in spacetime.