Fig. 3: Near-ultrastrong nonlinear coupling between linearized transmon A (light) and transmon qubit B (matter).
From: Near-ultrastrong nonlinear light-matter coupling in superconducting circuits
A Pulse diagram: resonant pulse of length τA driving linearized transmon A followed by pulse of frequency fB driving transmon B and readout with resonator B. B Readout resonator B response as a function of τA and fB. C Vertical line-cuts of panel B showing Rabi-like oscillation. D Horizontal line-cuts of panel B showing photon-number splitting of transmon B transition by transmon A’s excitation number \({\{\left\vert 0\right\rangle,\left\vert 1\right\rangle,\left\vert 2\right\rangle \}}_{A}\). E Pulse diagram: resonant pulse of length τB driving transmon qubit B followed by pulse of frequency fA driving linearized transmon A and readout with resonator A. F Readout resonator A response as a function of τB and fA. G Vertical line-cuts of panel F showing Rabi oscillation. H Horizontal line-cuts of panel F showing splitting of transmon A transition by transmon B’s qubit states \({\{\left\vert 0\right\rangle,\left\vert 1\right\rangle \}}_{B}\).
