7 papers
Ray-based framework for state identification in quantum dot devices
Justyna P. Zwolak, Thomas McJunkin, Sandesh S. Kalantre +4
Quantum dots (QDs) defined with electrostatic gates are a leading platform for a scalable quantum computing implementation. However, with increasing numbers of qubits, the complexi…
Radio frequency reflectometry in silicon-based quantum dots
Y. -Y. Liu, S. G. J. Philips, L. A. Orona +6
RF reflectometry offers a fast and sensitive method for charge sensing and spin readout in gated quantum dots. We focus in this work on the implementation of RF readout in accumula…
Fabrication process and failure analysis for robust quantum dots in silicon
J. P. Dodson, Nathan Holman, Brandur Thorgrimsson +7
We present an improved fabrication process for overlapping aluminum gate quantum dot devices on Si/SiGe heterostructures that incorporates low-temperature inter-gate oxidation, the…
The effect of external electric fields on silicon with superconducting gallium nano-precipitates
Brandur Thorgrimsson, Thomas McJunkin, E. R. MacQuarrie +2
Motivated by potential transformative applications of nanoelectronic circuits that incorporate superconducting elements, and by the advantages of integrating these elements in a si…
Auto-tuning of double dot devices in situ with machine learning
Justyna P. Zwolak, Thomas McJunkin, Sandesh S. Kalantre +7
The current practice of manually tuning quantum dots (QDs) for qubit operation is a relatively time-consuming procedure that is inherently impractical for scaling up and applicatio…
Measurements of capacitive coupling within a quadruple quantum dot array
Samuel F. Neyens, E. R. MacQuarrie, J. P. Dodson +9
We present measurements of the capacitive coupling energy and the inter-dot capacitances in a linear quadruple quantum dot array in undoped Si/SiGe. With the device tuned to a regi…