Nanowire-based RF-SQUID quantum memory device

Superconducting qubits are a promising avenue for quantum computing devices due to their high fidelity operation and scalability. Most superconducting qubit designs use Al-AlOx-Al based Josephson junctions as nonlinear inductors, but this solution has disparities given that the junction area and thickness are not consistent enough to reproduce precise qubit frequencies. Additionally, aluminum-oxide based junctions limit the types of qubits that can be fabricated. Here, we use a high-kinetic inductance material that has shown excellent performance in single-photon detectors to construct a nonlinear constriction or weak-link type element in a 3D RF-SQUID resonator. We demonstrate the strong non-sinusoidal behavior of the nanowire and the existence of non-hysteretic behavior and switching between meta-stable flux states.