Accession Number:

ADA622930

Title:

Investigating the Materials Limits on Coherence in Superconducting Charge Qubits

Descriptive Note:

Final rept. 1 Jul 2009-31 Aug 2014

Corporate Author:

YALE UNIV NEW HAVEN CT

Report Date:

2014-12-04

Pagination or Media Count:

26.0

Abstract:

This is the final report for the IARPA CSQ project at Yale University, on the coherence limits of superconducting charge qubits. During this project, we performed the proposed work investigating the various sources of decoherence and their origins in different materials, using the participation ratio paradigm that we developed and disseminated in the community. The original project goal was to increase by an order of magnitude the coherence time of the state-of-the-art qubits transmons and fluxonium designs from a few microseconds to greater than 20 microseconds. By project end, we realized qubit and cavity devices with times in excess of a millisecond, or an improvement by almost three orders of magnitude. These results, especially improved 3D designs, have been widely adopted and successfully reproduced by many groups across the superconducting qubit community. At program end, we have an existence proof that qubits satisfying the quantum error correction threshold are possible with existing materials and fabrication techniques, leading to a growing belief that large-scale quantum computation with solid-state devices will eventually be realized.

Subject Categories:

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

Distribution Statement:

APPROVED FOR PUBLIC RELEASE