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Breakdown of the cross-Kerr scheme for Photon Counting
Bixuan Fan, Anton F. Kockum, Joshua Combes +6
We show, in the context of single photon detection, that an atomic three-level model for a transmon in a transmission line does not support the predictions of the nonlinear polaris…
Giant Cross Kerr Effect for Propagating Microwaves Induced by an Artificial Atom
Io-Chun Hoi, C. M. Wilson, Göran Johansson +4
We have investigated the cross Kerr phase shift of propagating microwave fields strongly coupled to an artificial atom. The artificial atom is a superconducting transmon qubit in a…
Undoing measurement-induced dephasing in circuit QED
A. Frisk Kockum, L. Tornberg, G. Johansson
We analyze the backaction of homodyne detection and photodetection on superconducting qubits in circuit quantum electrodynamics. Although both measurement schemes give rise to back…