Spin-orbit qubit using quantum dots

US10482388B1 · kind B1 · utility

Assignee

• National Technology & Engineering Solutions of Sandia, LLC · US

Inventors

• Ryan Michael Jock · Albuquerque, US
• Martin Rudolph · Albuquerque, US
• Andrew David Baczewski · Albuquerque, US
• Wayne Witzel · Albuquerque, US
• Malcom S. Carroll · Albuquerque, US
• Patrick Harvey-Collard · Magog, CA
• John King Gamble, IV · Madison, US
• Noah Tobias Jacobson · Albuquerque, US
• Andrew Mounce · Albuquerque, US
• Daniel Robert Ward · San Mateo, US

Key dates

• Filing date: Jun 29, 2018
• Grant date: Nov 19, 2019
• Expiry date: Jun 29, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B82Y10/00
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

Methods and apparatus of quantum information processing using quantum dots are provided. Electrons from a 2DEG are confined to the quantum dots and subjected to a magnetic field having a component directed parallel to the interface. Due to interfacial asymmetries, there is created an effective magnetic field that perturbs the energies of the spin states via an interfacial spin-orbit (SO) interaction. This SO interaction is utilized to controllably produce rotations of the electronic spin state, such as X-rotations of the electronic spin state in a double quantum dot (DQD) singlet-triplet (ST) qubit. The desired state rotations are controlled solely by the use of electrical pulses.