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Q: Fachverband Quantenoptik und Photonik

Q 54: Quantum Sensing II (joint session Q/QI)

Q 54.2: Vortrag

Donnerstag, 13. März 2025, 11:30–11:45, HS I PI

Efficient simulations for long time dynamics of interacting quantum gases — •Annie Pichery and Naceur Gaaloul — Institut für Quantenoptik, Leibniz Universität Hannover, Germany

Ultra-cold atomic ensembles are a prime choice for sources in quantum sensing experiments. In the case of atom interferometry, long interrogation times are highly desirable to obtain high precision results. This requires a great control of the input states in term of size and position dynamics, as well as an efficient description of the dynamics along the different steps of the evolution time.

Space provides an environment where atom clouds can float for extended times of several seconds, as well as miscibility conditions not possible on ground. However, simulating such dynamics of single species Bose-Einstein Condensates (BEC) or interacting dual species BEC mixtures presents computational challenges due to the long expansion times and centre of mass motion induced by a displacement of the atom clouds. In this contribution, we present scaling techniques to overcome these limits. We focus also on simulation methods to interpret experiments with non-harmonic potentials or including effects of wavefront aberrations during the pulse sequences of atom interferometry.

Keywords: Bose-Einstein condensate; Quantum-degenerate mixtures; Microgravity