Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.30: Poster
Tuesday, March 12, 2024, 17:00–19:00, KG I Foyer
Heidelberg Quantum Architecture: Fast spin manipulation and magnetic field stabilization in a Fermi gas — Johanna Schulz, •Suraj Iyer, Juan Carlos Provencio Lameiras, Tobias Hammel, Maximilian Kaiser, Matthias Weidemüller, and Selim Jochim — Physikalisches Institut - Heidelberg University, Heidelberg, Germany
Heidelberg Quantum Architecture (HQA) is a new 6Li quantum gas experiment providing a fast, versatile, and expandable experimental platform for programmable quantum simulation. This poster presents techniques for spin manipulation and stabilization of magnetic fields generated by our Feshbach coils.
To prepare a deterministically controlled mixture of spin states, we drive Rabi oscillations between hyperfine states of the 2S1/2 ground state. We build radiofrequency and microwave coils that are mounted outside the science glass cell, to keep the components exchangeable, hence providing high magnetic fields at the position of the atoms. We are aiming for magnetic fields and Rabi oscillations in the order of 100kHz, which is about ten times faster than other machines in our group.
In the HQA high-fidelity control of interactions is realized by stabilizing the magnetic bias fields generated by the Feshbach coils. Fluctuations are mitigated by using a PID loop which measures the coil current through current transducers (CT). By using multiple CTs, we can achieve precise tunability of individual field parameters which includes the field offset, the field gradient, and the field curvature.
Keywords: HQA