Sandia Corporation

National Technology & Engineering Solutions of Sandia, LLC

Wayne Witzel

Noah Tobias Jacobson

Malcolm Carroll

John King Gamble, Iv

Anand Ganti

Ezra Bussmann

Daniel Robert Ward

James Ewers Levy

Rajib Rahman

Stephen M Carr

Andrew Mounce

Martin Rudolph

Andrew David Baczewski

Khoi Thi Nguyen

Malcom S Carroll

Nathaniel Bishop

Patrick Harvey-Collard

Erik Nielsen

Robin J Blume-Kohout

Ryan Michael Jock

Andrew J Landahl

Michael Lilly

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.

Spin-orbit qubit using quantum dots

A quantum computing device that includes a plurality of semiconductor adiabatic qubits is described herein. The qubits are programmed with local biases and coupling terms between qubits that represent a problem of interest. The qubits are initialized by way of a tuneable parameter, a local tunnel coupling within each qubit, such that the qubits remain in a ground energy state, and that initial state is represented by the qubits being in a superposition of |0&#x3e; and |1&#x3e; states. The parameter is altered over time adiabatically or such that relaxation mechanisms maintain a large fraction of ground state occupation through decreasing the tunnel coupling barrier within each qubit with the appropriate schedule. The final state when tunnel coupling is effectively zero represents the solution state to the problem represented in the |0&#x3e; and |1&#x3e; basis, which can be accurately read at each qubit location.

Semiconductor adiabatic qubits

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Albuquerque, NM, United States of America

Wayne Witzel