Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 37: Ultra-cold Atoms, Ions and BEC IV (joint session A/Q)
A 37.3: Talk
Friday, March 15, 2024, 11:30–11:45, HS 1098
Realizing freely programmable passively phase-stable 2D optical lattices — David Wei1,2, •Daniel Adler1,2, Kritsana Srakaew1,2, Suchita Agrawal1,2, Pascal Weckesser1,2, Immanuel Bloch1,2,3, and Johannes Zeiher1,2 — 1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany — 2Munich Center for Quantum Science and Technology (MCQST), 80799 Munich, Germany — 3Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 Munich, Germany
Ultracold atoms in optical lattices have become a vital platform for experimental quantum simulation, enabling the precise study of a variety of quantum many-body problems. For most experiments, the layout of the lattice beams restricts the accessible lattice configurations and thus the underlying physics. Here, we present a novel tunable lattice, which provides programmable unit cell connectivity and in principle allows for changing the geometry mid-sequence. Our approach builds on the phase-stable realization of a square or triangular lattice combined with microscopically projected repulsive local potential patterns. We benchmark the performance of this system through single-particle quantum walks in the square, triangular, kagome, and Lieb lattices. In the strongly correlated regime, we microscopically characterize the geometry dependence of the quantum fluctuations.
Keywords: optical lattices; ultracold atoms; quantum simulation; quantum gas microscopy