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Q: Fachverband Quantenoptik und Photonik
Q 23: Quantum Information I
Q 23.17: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
A multi-site quantum register of neutral atoms with single-site controllability — •Tilman Preuschoff, Dominik Schäffner, Lars Pause, Tobias Schreiber, Stephan Amann, Jan Lautenschläger, Malte Schlosser, and Gerhard Birkl — Institut für Angewandte Physik, TU Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany
Assembled arrays of neutral atoms offer a versatile platform for quantum technologies. As effectively non-interacting particles with identical intrinsic properties they also feature switchable interactions when excited to Rydberg states [1].
We present a micro-optical platform for defect-free assembled 2D clusters of more than 100 single-atom quantum systems [2]. Combined with a digital micromirror device (DMD), site-selective manipulation of the trapping potentials is possible while utilizing the robust architecture of microlens-based systems. We also discuss recent work with microlens arrays fabricated by femtosecond direct laser writing [3].
In addition, we present our open-source digital controllers for laser frequency and intensity stabilization [4]. Using the STEMlab (originally Red Pitaya) platform we achieve a control bandwidth of up to 1.25 MHz resulting in a laser line width of 52(1) kHz (FWHM) and intensity control to the 1 · 10−3 level.
[1] M. Schlosser et. al., J. Phys. B: At. Mol. Opt. Phys 53 144001 (2020).
[2] D. Ohl de Mello et. al., Phys. Rev. Lett. 122, 203601 (2019).
[3] D. Schäffner et. al., Opt. Express 28, 8640-8645 (2020).
[4] T. Preuschoff et. al., Rev. Sci. Instrum. 91, 083001 (2020).