Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 28: Poster – Quantum Optics
Q 28.30: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG
Bohmian Trajectories in a Double Slit Experiment — •Ozan Nacitarhan1,2,3, Carlotta Versmold1,2,3, Florian Huber1,2,3, Lukas Knips1,2,3, Jan Dziewior1,2,3, Eun Mi Kim1,2,3,4, and Harald Weinfurter1,2,3 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, München, Germany — 2Munich Center for Quantum Science and Technology, München, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany — 4Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
Bohmian mechanics provides a realist interpretation of quantum mechanics in terms of particles with definite positions, evolving along well-defined trajectories. In turn, this concept requires non-local effects, allowing instantaneous changes of the trajectory due to remote modifications of the setup.
Bohmian trajectories have been reconstructed via weak measurements and have been shown to agree with predicted ones in stationary setups. In our experiment, we record the trajectories of a photon in a double slit interferometer using direct phasefront measurements and additionally implement time-dependent which-way marking and delayed-choice quantum erasure to explore the theory*s non-locality. By initially entangling the double slit photon with a second photon, we are able to analyze the which-way-information and observe changes in the evolution of the interfering photon in dependence on the observation of the second photon. Thereby examining the need and consequences of the non-local mechanism in Bohmian mechanics.
Keywords: Bohmian Mechanics; Bohmian Trajectories; Quantum Non-locality