Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.28: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
A magic 1D lattice for ultracold, polar NaK molecules — •Frauke Seeßelberg1, Xin-Yu Luo1, Ming Li2, Scott Eustice1, Svetlana Kotochigova2, Immanuel Bloch1, and Christoph Gohle1,3 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Department of Physics, Temple University, Philadelphia, USA — 3Ludwig-Maximilians-Universität, München, Germany
Quantum gases of polar molecules allow for dipolar interactions in quantum simulation. They have large dipole moments at long lifetimes, which make them ideal for realizing long range physics beyond nearest neighbor interactions.
The rotational degree of freedom of molecules can be used to encode spins. Due to the different parity of ground and first excited rotational state their polarizabilities at optical frequencies can however differ significantly, which leads to decoherence in an optical dipole trap. The polarization of the trapping field can be used to tune this difference and even to achieve a magic condition, where it is zero. Then long coherence times between the two states should be achievable.
We experimentally explore the first excited rotational state manifold of fermionic NaK using microwave spectroscopy. We demonstrate how small static electric fields can be used to decouple nuclear spin and molecular rotation and thus to simplify the complex rotational state spectrum and allowing an even longer coherence time. We characterize the molecular polarizabilities in a 1550 nm 1D lattice and investigate physics around the magic angle.