ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,451,852, issued on Oct. 21, was assigned to Google LLC (Mountain View, Calif.).
"Josephson parametric coupler" was invented by Ofer Naaman (Santa Barbara, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Josephson parametric device is presented, which includes an input port, an output port, and a signal path between the input port and the output port. The signal path includes a first section coupled to the input port and having a first passband, a second section coupled to the output port and having a second passband a Josephson junction coupling element for parametric coupling between the first and second section. The Josephson junction coupling...