Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 8: Ultra-fast Phenomena I
HL 8.12: Talk
Monday, March 9, 2026, 18:00–18:15, POT/0006
Efficient Two-Dimensional Spectroscopy Simulations including Realistic Pulse Shapes, Overlapping, and Time-Ordering Effects — Rémi Gilliot1, 2, •Matteo Russo1, Alexander Blech1, Manuel Joffre2, Christiane Koch1, and Hélène Seiler1 — 1Freie Universität Berlin, Berlin, Germany — 2Institut Polytechnique de Paris, Palaiseau, France
We present an approach capable of simulating Two-Dimensional Electronic Spectroscopy (2DES) spectra with arbitrary pulse shapes, pulse overlap, and pulse ordering on a standard laptop. Under the assumption of simple dephasing, we show that the 2DES emitted signal - a convolution integral that involves pulses* fields and material response and that is traditionally challenging to evaluate numerically - reduces to a simple product of three independent one-dimensional integrals. This fortunate simplification makes this approach fast and computationally less expensive than others, while still capturing most of the realistic pulse-dependent effects listed above. Finally, we benchmark the effectiveness of this approach on three canonical systems - an anharmonic oscillator, two coupled oscillators, and a dimer model - studying how spectral phase distortions and strongly non-Gaussian pulse shapes, such as those produced by hollow-core fibers, can influence the 2DES emitted signal.
Keywords: Two-Dimensional Electronic Spectroscopy (2DES); Simulations; Simple Dephasing; Anharmonic Oscillator model; Hollow-core fiber