Spin-orbit qubit using quantum dots

Jock, Ryan Michael; Rudolph, Martin; Baczewski, Andrew David; Witzel, Wayne; Carroll, Malcolm S.; Harvey-Collard, Patrick; Gamble, IV, John King; Jacobson, Noah Tobias; Mounce, Andrew; Ward, Daniel Robert

Spin-orbit qubit using quantum dots

Patent · 19 November 2019

OSTI ID:1600305

Jock, Ryan Michael; Rudolph, Martin; Baczewski, Andrew David; Witzel, Wayne; Carroll, Malcolm S.; Harvey-Collard, Patrick; Gamble, IV, John King; Jacobson, Noah Tobias; Mounce, Andrew; Ward, Daniel Robert

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.

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Research Organization:: National Technology & Engineering Solutions of Sandia, LLC, Alburquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

DOE Contract Number:: NA0003525

Assignee:: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Number(s):: 10,482,388

Application Number:: 16/023,211

OSTI ID:: 1600305

Country of Publication:: United States

Language:: English

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