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Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 18: TR: Quantum Coherence and Quantum Information Systems 1

TT 18.4: Talk

Tuesday, March 23, 2010, 14:45–15:00, H21

Probing Phases of Interacting Polaritons in Circuit QED Setups — •Martin Leib and Michael Hartmann — TU München,Munich,Germany

Circuit QED systems pose a new paradym for reaching the strong coupling regime of photonic and atomic degrees of freedom and are thus ideal candidates for quantum simulation and computation. We are investigating one-dimensional arrays of transmission-line cavities, where each cavity is coupled to a transmon-qubit. This system can be used as a quantum many-body simulator, lowering the experimental requirements for prescission control with respect to the use as a quantum computing device. We exploit the intermediate qubit-harmonic oscillator regime of the transmon to simulate Bose-Hubbard physics. As a suitable experimental setup we consider a system where the first cavity is driven by a classical microwave source and the output voltage is monitored, with respect to signatures of a quantum phase transition, at the last cavity.

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