Investigating surface loss effects in superconducting transmon qubits

2016/05/25 by J. M. Gambetta, C. E. Murray, Y. -K. -K. Fung +5 · 1 citation
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1109/tasc.2016.2629670

published as IEEE Transactions on Applied Superconductivity 27 (1), 1700205 (2017) · 5 pages

arxiv created 2016/05/25 · arxiv updated 2017/02/14

Abstract

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.

Cited by

• Vanadium superconducting microwave resonators on silicon wafers

Related

• Analysis of RF Surface Loss in a Planar 2D Qubit
• Wiring surface loss of a superconducting transmon qubit
• Surface participation and dielectric loss in superconducting qubits
• Optimal design of a superconducting transmon qubit with tapered wiring
• Mapping the positions of Two-Level-Systems on the surface of a superconducting transmon qubit