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SUMMARY:Strongly correlated photons in coupled-cavity/circuit QED systems
DESCRIPTION:Motivated by the recent success of engineering strong light-matter interaction in various cavity/circuit QED architectures, there has been a surge of interest in realizing condensed matter-like systems with photonic systems. 
One of the most exciting questions in this emerging eld is whether one can realize a super uid-Mott insulator (SF-MI) transition of strongly correlated polaritons. 
The Jaynes-Cummings-Hubbard Model (JCHM) has been introduced to describe such a quantum phase transition of light in an array of coupled QED cavities, each containing a single photonic mode interacting with a two-level system. 
In the  
rst part of this talk we review recent theoretical results on the phase diagram, excitations and critical exponents of the JCHM and discuss similarities and di erences with the seminal Bose-Hubbard model (BHM) describing ultracold atoms in optical lattices [1, 2]. 
In the second part of the talk, we show that even in the simplest case of two coupled cavities (Jaynes-Cummings dimer) a sharp non-equilibrium selftrapping transition exists due to strong repulsive interactions among photons. 
We show, that the proposed system is realizable with the current generation of circuit-QED technology. Additionally, we point out a number of novel and interesting features due to the dissipative nature of the circuit QED realization [3]. 
References 
[1] S. Schmidt and G. Blatter, Phys. Rev. Lett. 103, 086403 (2009). 
[2] S. Schmidt and G. Blatter, Phys. Rev. Lett. 104, 216402 (2010). 
[3] S. Schmidt, D. Gerace, A.A. Houck, G. Blatter, and H. E. Tureci, Phys. 
Rev. B 82, 100507(R) (2010)
LOCATION:Erwin Schrödinger Saal
DTSTART:20110206T133000
DTEND:20110206T143000
TZID: Europe/Vienna
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