Systems, methods and apparatus for active compensation of...

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H01L 39/22 (2006.01)

Patent

CA 2736116

Apparatus and methods enable active compensation for unwanted discrepancies in the superconducting elements of a quantum processor. A qubit may include a primary compound Josephson junction (CJJ) structure, which may include at least a first secondary CJJ structure to enable compensation for Josephson junction asymmetry in the primary CJJ structure. A qubit may include a series LC-circuit coupled in parallel with a first CJJ structure to provide a tunable capacitance. A qubit control system may include means for tuning inductance of a qubit loop, for instance a tunable coupler inductively coupled to the qubit loop and controlled by a programming interface, or a CJJ structure coupled in series with the qubit loop and controlled by a programming interface.

La présente invention porte sur un appareil et sur des procédés qui permettent une compensation active des divergences non souhaitées entre des éléments supraconducteurs d'un processeur quantique. Un bit quantique peut comprendre une structure primaire de jonction Josephson composite (CJJ) qui peut comprendre au moins une première structure secondaire CJJ pour permettre une compensation de l'asymétrie de jonction Josephson dans la structure primaire CJJ. Un bit quantique peut comprendre un circuit LC série couplé en parallèle à une première structure CJJ pour donner une capacité réglable. Un système de commande de bit quantique peut comprendre des moyens pour régler l'inductance d'une boucle de bit quantique, par exemple un coupleur réglable couplé de manière inductive à la boucle de bit quantique et commandé par une interface de programmation, ou une structure CJJ couplée en série à la boucle de bit quantique et commandée par une interface de programmation.

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