Selective capping to reduce quantum bit dephasing

摘要

The device comprises a substrate; A superconducting quantum interference device (SQUID) disposed on an upper surface of the substrate and including a superconductor trace having at least one Josephson junction blocking the path of the superconductor trace, wherein the superconductor trace exhibits superconducting properties below its superconducting threshold temperature. Including a first superconductor material representative; And a dielectric capping layer on the top surface of the SQUID, the dielectric capping layer covering most of the superconductor trace of the SQUID, the capping layer including an opening through which the first region of the SQUID is exposed. The first region of SQUID comprises a first Josephson conjugate.