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Spin-orbit qubit using quantum dots

United States Patent

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10,482,388
November 19, 2019
View the Complete Patent at the US Patent & Trademark Office
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.
16/ 023,211
June 29, 2018
1/1
H01L 39/00 (20060101)H01L 39/22 (20060101)G06N 10/00 (20190101)H01L 39/12 (20060101)H01L 39/02 (20060101)B82Y 10/00 (20110101)
ACKNOWLEDGEMENT OF GOVERNMENT SUPPORT This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.