Photon-photon Interactions in Quasi-1D Lattices of Coplanar Waveguides

The field of circuit QED has emerged as a rich platform for both quantum computation and quantum simulation. Lattices of coplanar waveguide (CPW) resonators realize artificial photonic materials in the tight-binding limit [1] capable of realizing non-Euclidean geometries [2] and unconventional unit cells [3]. Combined with strong qubit-photon interactions, these systems can be used to study dynamical phase transitions, many-body phenomena, spin models in driven-dissipative systems, and interacting photons. In this talk, we present data from a quasi-1D coplanar waveguide lattice device with unconventional linear and flat bands, and 3 flux tunable qubits. By probing the device, we can directly map out the band structures that emerge from the lowest two photonic modes of the CPW resonator and examine qubit mediated interactions between lattice modes.



[1] D. Underwood et al., Phys. Rev. A 86, 023837 (2012)

[2] A. J. Kollár et al., Nature 571, 45 (2019)

[3] A. J. Kollár et al., Comm. Math. Phys. 376,1909 (2019)