Patent 11108380 was granted and assigned to NORTHROP GRUMMAN SYSTEMS CORPORATION on August, 2021 by the United States Patent and Trademark Office.
A capacitively-driven tunable coupler includes a coupling capacitor connecting an open end of a quantum object (i.e., an end of the object that cannot have a DC path to a low-voltage rail, such as a ground node, without breaking the functionality of the object) to an RF SQUID having a Josephson element capable of providing variable inductance and therefore variable coupling to another quantum object.