P07 - Entanglement as Tool in Quantum Information Processing

Barbara Kraus


Entanglement is a powerful resource in many applications of quantum processors. We will establish a novel insight into these intriguing correlations of multipartite systems by considering particular quantum informational tasks and analysing the entanglement required to achieve them. In particular, a deeper understanding of quantum computation and simulation is aimed for, with special emphasis on compressed quantum computation. On the one hand, this will allow us to identify quantum processes with the potential to outperform any classical device.

On the other, it will reveal features of multipartite entanglement that are responsible for the power of quantum processors. As a crucial task for the development of quantum processors is the accurate estimation of errors, we will propose new methods and tools for their assessment. Validating circuits will be put forward, and the usage of entangled states towards this task will be analyzed. Furthermore, new application of small to medium-sized multipartite entangled states, which are particularly suited for the experiments exploited by the SFB consortium, will be identified.

PI Barbara Kraus on
Entanglement as a Tool in Quantum Information Processing

BSc Albert Rico Andres, PhD Jose Carrasco, MSc Matthias Englbrecht, MSc David Gunn, BSc Eda Harmanci, MSc Martin Hebenstreit, Univ. Prof. Dr. Mag. Barbara Kraus, PhD Antoine Neven


Subproject Leader: Barbara Kraus

PostDoc: Jose Carrasco, Martin Hebenstreit, Antoine Neven

PhD student: David Gunn, Matthias Englbrecht

Master student: Marc Langer

Admin: David Spiegl


Mixed-State Entanglement from Local Randomized Measurements
A. Elben, R. Kueng, R. Huang, R. van Bijnen, C. Kokail, M. Dalmonte, P. Calabrese, B. Kraus, J. Preskill, P. Zoller, B. Vermesch
Phys. Rev. Lett. 125, 200501 (2020)

A link between symmetries of critical states and the structure of SLOCC classes in multipartite systems
O. Slowik, M. Hebenstreit, B.Kraus, A. Sawicki
Quantum 4, 300 (2020)

Computational power of matchgates with supplementary resources
M. Hebenstreit, R. Jozsa, B. Kraus, S. Strelchuk
Phys. Rev. A 102, 052604 (2020)

Local Transformations of Multiple Multipartite States
A. Neven, D. Gunn, M. Hebenstreit, B. Kraus
arXiv:2007.06256 [quant-ph] 2020

Symmetries and entanglement of stabilizer states
M. Englbrecht, B. Kraus
Phys. Rev. A 101, 062302 (2020)

All Pure Fermionic Non-Gaussian States Are Magic States for Matchgate Computations
M. Hebenstreit, R. Jozsa, B. Kraus, S. Strelchuk, M. Yoganathan
Phys. Rev. Lett. 123, 080503 (2019)

Matrix Product States: Entanglement, Symmetries, and State Transformations
D. Sauerwein, A. Molnar, J. I. Cirac, B. Kraus
Phys. Rev. Lett. 123, 170504 (2019)

Measurement outcomes that do not occur and their role in entanglement transformations
M. Hebenstreit, M. Englbrecht, C. Spee, J. I. de Vicente, B. Kraus
arXiv:1911.00004 [quant-ph] (2019)

A link between symmetries of critical states and the structure of SLOCC classes in multipartite systems
O. Słowik, M. Hebenstreit, B. Kraus, A. Sawicki
arXiv:1912.00099 (2019)

Open Positions:

1. PhD-Position:
- for further information please write to barbara.kraus@uibk.ac.at