Accession Number:

ADA622764

Title:

Low-Loss Materials for Josephson Qubits

Descriptive Note:

Final rept. 14 Jul 2009-13 Sep 2014

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA

Report Date:

2014-10-09

Pagination or Media Count:

30.0

Abstract:

I review progress at UCSB on understanding the physics of decoherence in superconducting qubits. Although many decoherence mechanisms were studied and fixed in the last 5 years, the most important ones are two-level state defects in amorphous dielectrics, nonequilibrium quasiparticles generated from stray infrared light, and radiation to slotline modes. With improved design, the performance of integrated circuit transmons using the Xmon design are now close to world record performance these devices have the advantage of retaining coherence when scaled up to 9 qubits.

Subject Categories:

  • Physical Chemistry
  • Electrical and Electronic Equipment
  • Crystallography
  • Quantum Theory and Relativity
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE