Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 79: Data Analysis, Information Technology and Artificial Intelligence 4
T 79.8: Vortrag
Mittwoch, 23. März 2022, 18:00–18:15, T-H38
Designing VQE ansatz circuits for track reconstruction with Quantum Computers at LUXE — Arianna Crippa1, Lena Funcke3, Tobias Hartung4, Beate Heinemann1,2, Karl Jansen1, Annabel Kropf1, Stefan Kühn5, Federico Meloni1, •David Spataro1, Cenk Tüysüz1, and Yee Chinn Yap1 — 1Deutsches Elektronen Synchrotron DESY — 2Albert-Ludwigs-Universität Freiburg — 3Massachusetts Institute of Technology — 4University of Bath — 5CaSToRC, The Cyprus Institute
The recently proposed Laser Und XFEL Experiment (LUXE) enables the study of Quantum Electrodynamics (QED) in the strong-field regime, where QED becomes non-perturbative. In this regime, the production of electron-positron pairs by field-induced tunneling out of the vacuum is realised in the interaction of a high energy electron beam from the European XFEL and a high power laser.
Positron track reconstruction on a silicon pixel tracking detector becomes a demanding combinatorial problem at high laser intensity. It is expected to measure up to 106 positrons on the four consecutive detector layers. A Quadratic Unconstrained Binary Optimization (QUBO) formulation enables the use of quantum computers and a Variational Quantum Eigensolver (VQE) to reconstruct tracks. For this, designing a suitable ansatz circuit which maps the track candidates to qubits is an important part of the VQE heuristic. Results are compared to common hardware efficient ansatzes. In addition, the final track reconstruction efficiency is compared to a classical approach.