Niklas Rohling

research interests

• quantum state tomography
• gate set tomography
• quantum-enhanced learning
• spintronics

positions

• since May 2024 postdoc at the Institute for Quantum Inspired and Quantum Optimization (Prof. Martin Kliesch, TU Hamburg)
• previously in the "Quantum Transport Group" (Prof. Wolfgang Belzig, University of Konstanz)
• before that researcher at the Center for Quantum Spintronics (Prof. Arne Brataas, NTNU, Trondheim)
• PhD studies in the group "Condensed matter theory and quantum information" (Prof. Guido Burkard, University of Konstanz)

publications and preprints

1. M. Seyed Heydari, W. Belzig, and N. Rohling, "Influence of disorder at Insulator-Metal interface on spin transport", arXiv:2403.19277
2. D. Wuhrer, N. Rohling, and W. Belzig, "Dipole-dipole-interaction-induced entanglement between two-dimensional ferromagnets", Appl. Phys. Lett. 125, 022404 (2024)
3. V. N. Ivanova-Rohling, N. Rohling, and G. Burkard, "Discovery of an exchange-only gate sequence for CNOT with record-low gate time using reinforcement learning", arXiv:2402.10559
4. N. Rohling and R. E. Troncoso, "Even-odd effect for spin current through thin antiferromagnetic insulator", Phys. Rev. B 108, 214416 (2023)
5. V. N. Ivanova-Rohling, N. Rohling, and G. Burkard, "Quantum State Tomography with Noisy Gates", EPJ Quantum Technology 10, 25 (2023)
6. D. Wuhrer, N. Rohling, and W. Belzig, "Theory of quantum entanglement and structure of the two-mode squeezed antiferromagnetic magnon vacuum", Phys. Rev. B 105, 054406 (2022)
7. V. N. Ivanova-Rohling, G. Burkard, and N. Rohling, "Quantum state tomography as a numerical optimization problem", New J. Phys. 23, 123034 (2021)
8. V. N. Ivanova-Rohling and N. Rohling, "Evaluating Machine Learning Approaches for Discovering Optimal Sets of Projection Operators for Quantum State Tomography of Qubit Systems", Cybernetics and Information Technologies 20 (6), 61 (2020)
9. V. N. Ivanova-Rohling and N. Rohling, "Optimal choice of state tomography quorum formed by projection operators", Phys. Rev. A 100, 032332 (2019)
10. E. L. Fjæbu, N. Rohling, A. Brataas. "Superconductivity at metal-antiferromagnetic insulator interfaces", Phys. Rev. B 100, 125432 (2019)
11. N. Rohling, E. L. Fjærbu, and A. Brataas. "Superconductivity induced by interfacial coupling to magnons", Phys. Rev. B 97, 115401 (2018)
12. E. L. Fjærbu, N. Rohling, and A. Brataas. "Electrically driven Bose-Einstein condensation of magnons in antiferromagnets", Phys. Rev. B 95, 144408 (2017)
13. N. Rohling and G. Burkard. "Optimizing electrically controlled echo sequences for the exchange-only qubit", Phys. Rev. B 93, 205434 (2016)
14. N. Rohling, M. Russ, and G. Burkard. "Hybrid spin and valley quantum computing with singlet-triplet qubits", Phys. Rev. Lett. 113, 176801 (2014)
15. N. Rohling and G. Burkard. "Tomography scheme for two spin-1/2 qubits in a double quantum dot", Phys. Rev. B 88, 85402 (2013)
16. N. Rohling and G. Burkard. "Universal quantum computing with spin and valley states", New J. Phys. 14, 083008 (2012)
17. N. Rohling and F. Grossmann. "Optimization of electron pumping by harmonic mixing", Phys. Rev. B 83, 205310 (2011)

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