Talk by Arne Løhre Grimsmø, Norwegian University of Science and Technology, Trondheim – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > NBI Calendar 2014 > Talk by Arne Løhre Gri...

Talk by Arne Løhre Grimsmø, Norwegian University of Science and Technology, Trondheim

 

Engineering “ultrastrong” light-matter coupling and the Dicke quantum phase transition with optical cavity QED

Earlier this year, a cold atom experiment was done at the Centre for Quantum Technologies in Singapore, realizing a non-equilibrium version of the paradigmatic “Dicke quantum phase transition.” I will talk a little bit about this experiment, and the theoretical ideas behind it. It is based on a scheme for “engineering” a tunable light-matter interaction, using cavity-assisted Raman transitions between internal atomic levels. The scheme was pioneered by Scott Parkins, at the University of Auckland, and further developed by Scott and myself. I will explain the basic idea, and show some of the possibilities the scheme offers, both on the single-atom and the many-atom level. I will talk briefly about the many-atom experiment done in Singapore, albeit from a theorist’s point of view. I will also discuss some possibilities that have not yet been explored experimentally.