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CAMP: Applications for cold atomic gasses

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Eite Tiesinga, Joint Quantum Institute
When
10 November 2015 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
David Weiss
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I have long-term interests in the physics of laser-cooled, ultra-cold
atoms.  So far the most important application of atoms at micro- and
nano-kelvin temperatures is in time and frequency standards, that is
atomic clocks.  Here, the goal to isolate just one atom, not affected by
its environment or other atoms.  On the other hand their collisions or
interactions are crucial in collective or many-body systems in which,
for example, we can simulate (quantum) phase transitions, such as
interaction-induced transitions to and from superfluidity.

In this presentation I will describe our latest research to understand
atomic interactions and explain the role of quantum- or wave-mechanics
in
these collisions. In particular, I will focus on our ability to control
resonant scattering by applying  modest magnetic fields. In other words
the effective cross section (or diameter) of an atom is tuneable and
variable over orders of magnitude.  I will describe applications for
these
resonances that are on the boundary between few- and many-body physics
as well as between many-body physics and quantum optics.

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