SMuK 2023 – scientific programme
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T: Fachverband Teilchenphysik
T 46: Calorimeter / Detector Systems II
T 46.4: Talk
Tuesday, March 21, 2023, 17:45–18:00, WIL/C133
QUBO partitioning and choice of quantum device for charged particle track reconstruction at LUXE — •Annabel Kropf1,2, Arianna Crippa1,3, Lena Funcke4,5, Tobias Hartung6, Beate Heinemann1,2, Karl Jansen1,3, Stefan Kuehn1, Federico Meloni1, David Spataro1,2, Cenk Tüysüz1,3, and Yee Chinn Yap1 — 1DESY — 2Albert-Ludwigs-Universität Freiburg — 3Humboldt-Universität zu Berlin — 4Universität Bonn — 5MIT — 6Northeastern University, London
LUXE (Laser Und XFEL Experiment) is a proposed experiment at DESY using the electron beam of the European XFEL and a high-intensity laser. The experiment’s primary aim is to investigate the transition from the well-probed perturbative to the non-perturbative Quantum Electrodynamics regime. In LUXE’s initial phase, positrons are produced that impinge on a four-layered pixel detector with occupancies of up to 100 hits/mm2. Reconstructing positron trajectories is a combinatorial problem challenging for a classical computer to solve. Our group explores the novel approach of expressing the track pattern recognition problem as a quadratic unconstrained binary optimization (QUBO), allowing the algorithm to be mapped onto a quantum computer. Splitting the QUBO term into mappable subQUBOS is required because the size of the QUBO exceeds the number of qubits of state-of-the-art quantum computers. This talk investigates the influence of the QUBO splitting algorithm on the final track reconstruction efficiency. Additionally, the effectiveness of a gate-based quantum computer and a quantum annealer for applying the QUBO approach will be compared.