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Colloquium: Few- and many-body physics with ultracold Rydberg gases

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Robin Cote, University of Connecticut
When
26 February 2015 from 4:00 PM to 5:00 PM
Where
117 Osmond Laboratory
Contact Name
Kurt Gibble
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In recent years, there has been an explosion of exciting

> results involving Rydberg atoms. Due to their exaggerated properties

> (long lifetimes, large size and polarizability, etc.), Rydberg atoms

> shed new light onto few- and many-body physics, and open new research

> avenues. In this presentation, particular phenomena will be discussed,

> notably exotic molecules and new binding mechanism, and the effect of

> strongly interacting atoms leading to the blockade mechanism and its

> application to quantum information. We will also explore the behavior

> of Rydberg atoms in an atomic Bose-Einstein condensate (BEC).

> Impurities in a BEC have attracted much attention and motivated

> investigations of a wide range of phenomena e.g., probing the

> superfluid dynamics or polaron physics. Here, we show that the

> interaction between the quasi-free Rydberg electrons and ground state

> atoms results in the exchange of collective excitations (phonons)

> leading to a Yukawa potential. We will discuss different regimes

> determined by the scattering length of BEC atoms.

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