Initial Design of a W-Band Superconducting Kinetic Inductance Qubit

Superconducting qubits are widely used in quantum computing research and industry. We describe a superconducting kinetic inductance qubit (and introduce the term Kineticon to it) operating at W-band frequencies with nonlinear nanowire section that provides anharmonicity required for two distinct energy states. Operating higher may relax dilution refrigerator temperature requirements these devices paves path multiplexing large number of qubits. Millimeter-wave operation requires superconductors relatively high $T_c$, which implies gap frequency, 2$\Delta/h$, beyond photons break Cooper pairs. For example, NbTiN $T_c =15\,\text{K}$ has frequency near 1.4 THz, is much than aluminum (90 GHz), allowing throughout millimeter-wave band. Here we design simulation embedded 3-D cavity. perform classical electromagnetic calculations resulting field distributions.