Jerry M. Chow, Jay M. Gambetta, et al.
Nature Communications
Superconducting qubits are sensitive to a variety of loss mechanisms including dielectric loss from interfaces. By changing the physical footprint of the qubit, it is possible to modulate sensitivity to surface loss. Here, we show a systematic study of planar superconducting transmons of differing physical footprints to optimize the qubit design for maximum coherence. We find that qubits with small footprints are limited by surface loss and that qubits with large footprints are limited by other loss mechanisms, which are currently not understood.
Jerry M. Chow, Jay M. Gambetta, et al.
Nature Communications
Conal E. Murray, Charles C. Goldsmith, et al.
Applied Physics Letters
Conal E. Murray, I.C. Noyan
Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Andrew W. Cross, Lev S. Bishop, et al.
Physical Review A