SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information (joint session QI/Q)
Q 11.21: Poster
Mittwoch, 22. September 2021, 16:30–18:30, P
A multi-site quantum register of neutral atoms with single-site controllability — •Lars Pause, Tilman Preuschoff, Stephan Amann, Malte Schlosser, and Gerhard Birkl — Institut für Angewandte Physik, TU Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany
Assembled arrays of neutral atoms are a versatile platform for quantum techologies. As effectively non-interacting particles with identical intrinsic properties they also feature switchable interactions when excited to Rydberg states. This makes neutral atoms well suited for quantum simulation, computation, and metrology.
We present our unique micro-optical implementation of triangular arrays of optical tweezers. 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. The addition of a single movable optical tweezer enables atom sorting for achieving defect-free structures of individual atoms. We also discuss recent work with microlens arrays fabricated by femtosecond direct laser writing [1].
In addition, we present our open-source digital controllers for laser frequency and intensity stabilization [2]. 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] D. Schäffner et. al., Opt. Express 28, 8640-8645 (2020).
[2] T. Preuschoff et. al., Rev. Sci. Instrum. 91, 083001 (2020).