Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 50: Ultracold Matter (Fermions) I (joint session Q/A)
Q 50.6: Talk
Thursday, March 13, 2025, 12:15–12:30, HS V
Quantum Computation with fermionic Li-6 atoms in optical lattices — •Johannes Obermeyer1, Petar Bojović1, Si Wang1, Marnix Barendregt1, Dorothee Tell1, Immanuel Bloch1,2, Titus Franz1, and Timon Hilker3 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Ludwig-Maximilians-Universität, München, Germany — 3University of Strathclyde, Glasgow, UK
In our quantum gas microscope, we load fermionic Li-6 atoms into isolated double wells in optical superlattices. By precisely controlling the relative phase and intensity of the superlattices, we encode single- and two-qubit gates within these isolated double-wells, which constitute the building blocks for digital, fermionic quantum computation. Site-resolved measurement of spin and density allows us to fully characterize the initial state preparation and the quantum gate fidelity. In this talk, I will present how we realized high-fidelity SWAPα two-qubit gates with over one hundred atoms. We demonstrate long coherence and stability of the qubit and we characterize main error mechanisms. These results hold substantial promise for quantum computation tasks, including the simulation of electronic systems like molecular structures.
Keywords: Quantum computation; Quantum gas microscope; Quantum simulation