Felix Nissen, Johannes M. Fink, Jonas A. Mlynek, Andreas Wallraff, Jonathan Keeling
We report the experimental observation, and a theoretical explanation, of collective suppression of linewidths for multiple superconducting qubits coupled to a good cavity. This demonstrates how strong qubit-cavity coupling can significantly modify the dephasing and dissipation processes that might be expected for individual qubits, and can potentially improve coherence times in many-body circuit QED.
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http://arxiv.org/abs/1302.0665
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