Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Quantum Computing and Simulation I (joint session Q/QI)
Q 51.1: Vortrag
Donnerstag, 13. März 2025, 11:00–11:15, AP-HS
Simulating scalar quantum field theories on integrated photonics platforms — •Mauro D'Achille1, Martin Gärttner1, and Tobias Haas2 — 1Friedrich Schiller Universität, Jena, Germany — 2Université Libre de Bruxelles, Bruxelles, Belgium
Photonic multimode systems are an emerging quantum simulation platform ideally suited for emulating non-equilibrium problems in quantum field theory. I will present a new decomposition*for the time evolution generated by a large class of field-theoretic quadratic Hamiltonians*in terms of optical elements. The peculiarity of this decomposition consists in the way the time parameter is taken into account. Indeed, for such a class, it is always possible to decouple the time evolution in time-dependent phase shift transformations by means of a proper time-independent symplectic transformation composed by squeezers and beam splitters. I will conclude with physically relevant examples and applications aimed to analyze and simulate how the entanglement entropy associated to local and non-local theories spreads over time.
Keywords: Quantum simulation; Quantum optics; Quantum field theory; Multimode bosonic systems; Entanglement entropy