Credit: (Top) H. Wang et al., from supplemental material for [1]; (Bottom) Adapted from [1] by Alan Stonebraker

Figure 1: (Top) Optical micrograph of the device used by Wang et al. [1] to entangle spatially separated photons stored in superconducting resonators. A and B label the waveguide resonators, which are entangled in the experiment. The phase qubits $q0$ and $q1$ are Josephson junction phase qubits, while C is a coupling resonator used to mediate the interaction between the qubits. (Bottom) Equivalent circuit schematic for the device.