Quantum 2025 – scientific programme
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TUE: Tuesday Contributed Sessions
TUE 3: Quantum Field Theory
TUE 3.1: Talk
Tuesday, September 9, 2025, 14:15–14:30, ZHG003
Photonic simulation of quantum field dynamics — •Mauro D'Achille1, Martin Gärttner1, and Tobias Haas2 — 1Friedrich-Schiller-Universität Jena — 2Universität Ulm
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 shifters 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 information; quantum simulation; quantum optics; quantum field theory