Events at Physics |
In the second part of the talk, I report on the observation of key signatures of a two-photon driven Jaynes-Cummings model, which unveils the upconversion dynamics of a superconducting flux qubit coupled to an on-chip resonator. The experimental results show a clear evidence for the coexistence of one- and two-photon driven level anticrossings of the qubit-resonator system. This results from the symmetry breaking of the system Hamiltonian, when parity becomes a not well-defined property. This experiment provides deep insight into the interplay of multiphoton processes and symmetries in a qubit-resonator system.