Abstract: Recent improvements in materials growth and fabrication techniques may finally allow for superconducting semiconductors to realize their potential. I will discuss our recent proposal to construct superconducting devices such as wires, Josephson junctions, and qubits inside and out-of a single crystal, such as silicon or germanium [1,2]. The epitaxial and semiconductor nature of these devices, along with the extreme flexibility in device design of superconducting circuits down to the single-atom scale, may enable lower-noise and/or fundamentally novel devices and physics. We consider applications for such super-silicon devices, showing that the state-of-the-art transmon qubit and the sought-after phase-slip qubit can both be realized. The latter qubit leverages the natural high kinetic inductance of these materials. Building on this, we explore how kinetic inductance based particle detectors (e.g., photon or phonon) could be realized with potential application in astronomy or nanomechanics. First-generation super-semi devices in silicon, germanium, or diamond, which would not require atomistic fabrication approaches, could be realized in the near-term. Finally I will comment on different but related experiments which are already demonstrating the promise of super-semi-based "traditional" qubits for quantum information processing [3,4].
Notes: LPS is located at 8050 Greenmead Drive in College Park. There is parking at LPS and overflow parking at the adjacent LTS building but not at the 4H building. LPS is on the UMCP shuttle route; take #105 for the Courtyard Apts. Please use the phone on the left hand side of the front door to call the receptionist for entry.