I am interested in modelling, simulating, learning and controlling quantum systems with applications in quantum technologies, often related to spin dynamics. A particular interesting aspect of this is to learn physical laws of a system to enable to control it. Applications are focused on quantum spin networks, spintronics, magnetic resonance imaging and spectroscopy, and chemical synthesis.
B. Thorpe, K. Kalna, F.C. Langbein, S.G. Schirmer. Monte Carlo Simulations of Spin Transport in Nanoscale InGaAs Field Effect Transistors. J Applied Physics, 122, 223903, 2017. [DOI:10.1063/1.4994148] [arXiv:1610.04114] [PDF]
S. G. Schirmer, E. Jonckheere, F. C. Langbein. Design of Feedback Control Laws for Information Transfer in Spintronics Networks. IEEE Trans Automatic Control, 63(8):2523-2536, 2018. [DOI:10.1109/TAC.2017.2777187] [arXiv:1607.05294] [PDF]
FC Langbein, S O’Neil, SG Schirmer. Energy landscape controllers for quantum state transfer in spin-1/2 networks with ring topology, Version 1, Research Directions, Cambridge Open Engage, Dec 02, 2022. [DOI:10.33774/coe-2022-35xgg]
FC Langbein, SG Schirmer, E Jonckheere. Time optimal information transfer in spintronics networks. IEEE 54th Ann. Conf. Decision and Control (CDC), pp. 6454-6459, 2015.
E. Jonckheere, F. C. Langbein, S. G. Schirmer. Information Transfer Fidelity in Spin Networks and Ring-based Quantum Routers. Quantum Information Processing, 14(12):4761-4785, 2015. [DOI:10.1007/s11128-015-1136-4] [arXiv:1408.3765] [PDF]
F. C. Langbein. Optimal Control of Chemical Reactions with Data-Driven Models. Presentation at the Closed Loop Optimisation of Synthesis meeting at GSK, 16 April 2015, Stevenage, United Kingdom. [PDF]
January 2015 - December 2017: Data-Driven Simulation of Quantum Spin Network Devices. PI: F. C. Langbein with S. G. Schirmer, K. Kalna, A. Martinez, D. Burgarth.
Sophie Schirmer, Frank Langbein. The ubiquitous problem of learning system parameters for dissipative two-level quantum systems: Fourier analysis versus Bayesian estimation. Phys Rev A, 91:022125, 2015. [DOI:10.1103/PhysRevA.91.022125] [arXiv:1412.4282] [PDF]
S. G. Schirmer, F. C. Langbein. Characterization and Control of Quantum Spin Chains and Rings. In: Proc. 6th Int Symp Communications, Control and Signal Processing (ISCCSP), pp. 615 – 619, May 2014. [DOI:10.1109/ISCCSP.2014.6877950] [arXiv:1403.0226] [PDF]
E. Jonckheere, F. C. Langbein, S. Schirmer. Quantum networks: Anti-core of spin chains. Quantum Information Processing. 13(7):1607-1637, 2014. [DOI:10.1007/s11128-014-0755-5] [arXiv:1403.0159] [PDF]