Scalable photonic quantum computing with hybrid resource states

US11341428B2 · kind B2 · utility

Assignee

• XANADU QUANTUM TECHNOLOGIES INC. · CA

Inventors

• Joseph Eli BOURASSA · Toronto, CA
• Ilan TZITRIN · Vaughan, CA
• Krishnakumar Sabapathy · Middle Sackville, CA
• Guillaume DAUPHINAIS · North York, CA
• Ish DHAND · Toronto, CA
• Saikat Guha · Everett, US
• Nicolas Menicucci · Melbourne, AU
• Rafael Alexander · Albuquerque, US
• Ben Baragiola · Melbourne, AU
• Takaya Matsuura · Tokyo, JP
• Blayney Walshe · Geelong, AU

Key dates

• Filing date: Sep 29, 2021
• Grant date: May 24, 2022
• Expiry date: Sep 29, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G06N10/40
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A system for scalable, fault-tolerant photonic quantum computing includes multiple optical circuits, multiple photon number resolving detectors (PNRs), a multiplexer, and an integrated circuit (IC). During operation, the optical circuits generate output states via Gaussian Boson sampling (GBS), and the PNRs generate qubit clusters based on the output states. The multiplexer multiplexes the qubit clusters and replaces empty modes with squeezed vacuum states, to generate multiple hybrid resource states. The IC stitches together the hybrid resource states into a higher-dimensional cluster state that includes states for fault-tolerant quantum computation.