SAMOP 2021 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 13: Quantum Gases and Matter Waves (joint session Q/A)

A 13.13: Poster

Dienstag, 21. September 2021, 16:30–18:30, P

Few Fermions in optically rotating traps — •Philipp Lunt, Paul Hill, Diana Körner, Jonas Drotleff, Daniel Dux, Ralf Klemt, Selim Jochim, and Philipp Preiss — Physikalisches Institut der Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

The formal equivalence of electrons in an external magnetic field and neutral atoms in rapidly rotating traps opens up new avenues to study fractional quantum hall physics with ultracold atomic gases.

In order to access the microscopic level of strongly correlated quantum hall states we build on our previously established experimental methods - the deterministic preparation of ultracold ⁶Li few Fermion systems in low dimensions [1,2], as well as local observation of their correlation and entanglement properties on the single atom level [3].

Here, we present current experimental progress towards adiabatic preparation of deterministic few Fermion states in rapidly rotating optical potentials. We achieve rotation in an all-optically manner by interference of a Gaussian and Laguerre-Gaussian (LG) mode generated by a spatial light modulator [4]. In particular, we showcase the optical setup, which includes elaborate methods to cancel phase aberrations in order to meet the challenging requirement regarding the isotropy of the potential geometry.

[1] Serwane et al. Science 332 (6027), 336-338 [2] Bayha et al. Nature 587, 583-587 (2020) [3] Bergschneider et al. Nat. Phys. 15, 640-644 (2019) [4] Palm et al 2020 New J. Phys. 22 083037