|Location: Hörsaal A
Time: Monday 23.11.2009, 14h c.t.
The interplay between coherent tunnel coupling and on-site interactions in dissipation-free bosonic systems has lead to many spectacular observations, ranging from the demonstration of number-phase uncertainty relation to quantum phase transitions. In this connection there has been recently an increasing attention to the properties of arrays of coupled cavities. I will first review the recent advances in the field. I will then describe a particular device which functions as the quantum optical analog of a Josephson interferometer. It consists of two coherently driven linear optical cavities connected via a central cavity with a single-photon nonlinearity. The Josephson-like oscillations in the light emitted from the central cavity as a function of the phase difference between two pumping fields can be suppressed by increasing the strength of the nonlinear coupling.Dario Gerace, Hakan E. Tureci, A. Imamoglu, Vittorio Giovannetti, and Rosario Fazio, Nature Physics 5, 281 (2009)