Fig. 3 | npj Quantum Information

Fig. 3

From: Deterministic bidirectional communication and remote entanglement generation between superconducting qubits

Fig. 3

Device circuit diagram. Each chip consists of a frequency-tunable transmon, a resonator included for readout, and a second resonator coupled to the coaxial cable (~1 m) that provides the communication link between the chips. The cable we used is a Tin-dipped Hand-formable Microwave Cable (UT-085C-Form) with the silver-plated copper wire. The two communication resonators are designed to have identical frequencies. They are chosen to be coplanar waveguide resonators with a large center pin and gap width to make the frequency insensitive to fabrication variations.41 The simple circuit diagram shows the circuit model of each module. We induce resonant interactions between the transmon and the communication mode by modulating the transmon frequency via its flux bias at the frequency difference (detuning) between the mode and the transmon

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