Erlangen 2022 – scientific programme
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A: Fachverband Atomphysik
A 11: Ultra-cold plasmas and Rydberg systems (joint session A/Q)
A 11.2: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
Creating spin spirals with tunable wavelength in a disordered Heisenberg spin system — •Eduard Jürgen Braun1, Titus Franz1, Lorenz Luger1, Maximilian Müllenbach1, André Salzinger1, Sebastian Geier1, Clément Hainaut2, Gerhard Zürn1, and Matthias Weimüller1 — 1Physikalisches Instut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Université de Lille, CNRS, UMR 8523, France - PhLAM - Physique des Lasers, Atomes et Molécules
We present a novel method to create a spin spiral in a Heisenberg spin system composed of Rydberg atoms. We have designed a protocol that allows to create a spin spiral of a fixed wavevector q for an interacting spin system composed of two different angular momentum Rydberg states of Rubidium. By creating a constant electric gradient field around a fixed offset electric field one can achieve a linear detuning between the two Rydberg levels as function of position. As a consequence, after applying a π/2-pulse the wavelength can be tuned by the duration for which the gradient field is applied. We investigate numerically how the disorder in our system and the interaction can disturb the spiralization as well as how fast the electric fields can be ramped in order to still adiabatically follow the Rydberg states in the Stark map. The subsequent relaxation dynamics of the spirals for varying wavefector q gives insight into the mode of transport in the Heisenberg spin system. First numerical simulations with few atoms in 1D suggest that we might find a localized regime for sufficiently strong disorder in the system.