Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Quantum Computing and Simulation IV

Q 35.1: Invited Talk

Wednesday, March 4, 2026, 14:30–15:00, P 10

Quantum field simulation on bosonic platforms — •Tobias Haas — Institut für Theoretische Physik and IQST, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Germany — Centre for Quantum Information and Communication, École polytechnique de Bruxelles, CP 165, Université libre de Bruxelles, 1050 Brussels, Belgium

Quantum field simulators offer unique opportunities to investigate otherwise inaccessible phenomena through tabletop experiments. Taming the complexity of such inherently high-dimensional models requires efficient encodings paired with experimentally friendly readout methods.

First, we introduce the Optical Time Algorithm (OTA) as a unifying framework that enables the simulation of a wide range of free quantum field dynamics using a single optical circuit design [1]. By modifying the optical elements' parameters, our method allows us to engineer essentially arbitrary timescales, coupling graphs, spacetime metrics, and boundary conditions.

Second, we put forward the classical entropy method as a universal data-driven toolkit for directly probing information measures from typical measurement data [2]. We show that well-known features of quantum information measures carry over to suitably chosen classical measures. As applications, we demonstrate the area-to-volume law transition in the quench dynamics of a spin-1 Bose-Einstein condensate [3,4] and report the first experimental observation of an area law in an interacting quantum field simulator [5].

[1] arXiv:2506.23838 [2] arXiv:2404.12320 [3] PRAL 112, L011303 [4] NJP 27, 043004 [5] arXiv:2510.13783

Keywords: Quantum field simulation; Classical entropy method; Area Laws; Quantum optics; Ultracold quantum gases