We are a broadly interested research group, working on topics including

• Characterization of quantum processes and verification of quantum computing components
• Quantum tomography
• (Hybrid) quantum computing
• Quantum simulation (certification)
• Compressed sensing
• Tensor networks
• Aspects of computational complexity
• Applied math

See Contact for directions

News

• 05|2021 A press release to our projects was published
• 05|2021 Nikolai Miklin joined the group as a postdoc. Warm welcome!
• 05|2021 The BMBF project MIQRO with our contribution "Characterization, benchmarking and showcase applications for emerging quantum hardware" is starting.
• 04|2021 Christopher Cedzich joined the group as a postdoc. Warm welcome!
• 04|2021 Pascal Baßler joined the group as PhD student. Warm welcome!
• 03|2021 The BMBF project MANIQU with our contribution "Efficient readout of NISQ computers" is starting.
• 03|2021 Optimal noise estimation from syndrome statistics of quantum codes published in Phys. Rev. Research
• 02|2021 Mirko Arienzo and Matthias Zipper joined the group PhDs students, Markus Heinrich as postdoc. Warm welcome!
• 01|2021 Theory of quantum system certification published as a tutorial in PRX Quantum
• 01|2021 Training variational quantum algorithms is NP-hard uploaded to the arXiv
• 11|2020 Our group will be supported by the prestigious Emmy Noether program
• 10|2020 We are hiring: see here
• 09|2020 Alexander Gresch is starting his PhD. Warm welcome (again)!
• 06|2020 Alexander Gresch has finished his Master's degree. Congratulations!
• 06|2020 Reliable recovery of hierarchically sparse signals for Gaussian and Kronecker product measurements finally published in IEEE Transactions on Signal Processing
• 12|2019 Philipp Kammann has finished his Bachelor's degree. Congratulations!
• 08|2019 Recovering quantum gates from few average gate fidelities published in Quantum
• 06|2019 Sample complexity of device-independently certified "quantum supremacy featured in Phys.org
• 04|2019 Simultaneous structures in convex signal recovery - revisiting the convex combination of norms published in Frontiers in Applied Mathematics and Statistics
• 04|2019 Sample complexity of device-independently certified "quantum supremacy accepted in PRL
• 12|2018 Sample complexity of device-independently certified "quantum supremacy -> arXiv
• 11|2018 Recovering quantum gates from few average gate fidelities accepted for a talk at QIP 2019 (among the 60 out of 349 accepted submissions)
• 10|2018 Start of a new lecture: Machine learning in quantum physics
• 09|2018 Recovering quantum gates from few average gate fidelities selected as Editor's Suggestion in PRL
• 08|2018 Lennart Bittel and Raphael Brieger are starting their PhDs. Warm welcome!
• 06|2018 Note on the saturation of the norm inequalities between diamond and nuclear norm accepted in IEEE Trans. Inf. Theory
• 05|2018
  Fidelity witnesses for fermionic quantum simulations made it into PRL
• 04|2018
  Start: junior professorship for quantum technology at the Heinrich Heine University of Düsseldorf
• 03|2018
  Book chapter on thermal quantum states -> arXiv
• 12|2017
  Direct certification of a class of quantum simulations selected as anniversary highlight in Quantum Science and Technology
• 11|2017
  On products of Gaussian random variables -> arXiv
• 08|2017
  Proceedings: On the distribution of a product of N Gaussian random variables
• 06|2017
  Guaranteed recovery of quantum processes from few measurements and
  Mixing properties of stochastic quantum Hamiltonians at TQC in Paris
• 11|2016
  Mixing Properties of Stochastic Quantum Hamiltonians made it into CMP