Investigating the Materials Limits on Coherence in Superconducting Charge Qubits
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 04, 2014
- Accession Number
- ADA622930
Entities
People
- L. I. Glazman
- Luigi Frunzio
- Michel Devoret
- Robert J. Schoelkopf
- Steven Girvin
Organizations
- Yale University