Scalable quantum computer architecture with coupled donor-quantum dot qubits

US8816325B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Thomas Schenkel · San Francisco, US
• Cheuk Chi Lo · Berkeley, US
• Christoph Weis · Berkeley, US
• Stephen Lyon · Cranbury, US
• Alexei M. Tyryshkin · Yardley, US
• Jeffrey Bokor · Oakland, US

Key dates

• Filing date: Oct 4, 2012
• Grant date: Aug 26, 2014
• Expiry date: Oct 4, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10D48/3835
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

A quantum bit computing architecture includes a plurality of single spin memory donor atoms embedded in a semiconductor layer, a plurality of quantum dots arranged with the semiconductor layer and aligned with the donor atoms, wherein a first voltage applied across at least one pair of the aligned quantum dot and donor atom controls a donor-quantum dot coupling. A method of performing quantum computing in a scalable architecture quantum computing apparatus includes arranging a pattern of single spin memory donor atoms in a semiconductor layer, forming a plurality of quantum dots arranged with the semiconductor layer and aligned with the donor atoms, applying a first voltage across at least one aligned pair of a quantum dot and donor atom to control a donor-quantum dot coupling, and applying a second voltage between one or more quantum dots to control a Heisenberg exchange J coupling between quantum dots and to cause transport of a single spin polarized electron between quantum dots.