The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2023
Filed:
Mar. 01, 2021
Massachusetts Institute of Technology, Cambridge, MA (US);
Socpra Sciences ET Genie S.e.c., Sherbrooke, CA;
William D. Oliver, Arlington, MA (US);
Simon Gustavsson, Cambridge, MA (US);
Roni Winik, Somerville, MA (US);
Catherine Leroux, Sainte Julie, CA;
Agustin Di Paolo, Sherbrooke, CA;
Alexandre Blais, Sherbrooke, CA;
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A quantum circuit called a 'qumon' is provided to cancel unwanted ZZ interaction in a superconducting qubit architecture. The qumon qubit has a high coherence, and a positive anharmonicity that may be tuned to cancel the negative anharmonicity in a coupled qubit, such as a transmon qubit. The qumon has three parallel branches, in which are a shunt capacitor; a Josephson junction having weighted energy level and capacitance; and several Josephson junctions in series. The weight is chosen to provide the desired anharmonicity, and the transverse flux noise and transverse charge noise each decrease in proportion to the number of the Josephson junctions in series. Because unwanted ZZ interactions are canceled, qumon qubits and transmon qubits may be capacitively coupled in an alternating pattern to provide a surface code in which these interactions are canceled in an extensible way.