Events Calendar
Realizing spin lattice models with polar molecules
Thursday October 24, 2013
| 3:30 pm
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Presenter: | Ana Maria Rey, University of Colorado (JILA) |
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| Series: | CQuIC Seminars | |
| Abstract: |
Recent experimental developments on cooling, trapping, manipulating and loading ultra-cold ground state molecules in an optical lattice have opened the door for the exploration of quantum magnetism and the observation of complex quantum dynamics. In this talk I will discuss recent developments at JILA towards the implementation of controllable spin lattice models using KRb molecules with the spin degrees of freedom encoded in rotational states. The spin-spin couplings are generated by long range and anisotropic dipolar interactions and can be controlled by dc electromagnetic fields and microwaves. We have been able to observe for the first time clear manifestation of dipolar exchange interactions in Ramsey spectroscopy even at substantially less than unit lattice filling. I will present new theoretical methods that we developed to model the non-equilibrium dynamics and show that those reproduce the experimental observations. The methods are general and applicable to other relevant quantum systems including trapped ions, Rydberg atoms and nitrogen vacancy centers. Even though so far the spin dynamics has been restricted to pinned molecules, in part to prevent chemical reactions, I will discuss and present experimental evidence that demonstrates why, thanks to the continuous quantum Zeno mechanism, losses are not a fundamental obstacle for the realization of itinerant spin models with polar molecules.
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| Host: | Amir Kalev | |
| Location: | PAIS-2540, PAIS | |
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