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Preliminary Exam
Gate tunable spin splitting of germanium quantum well Josephson junctions
Date: Friday, October 18th
Time: 1:00 pm - 3:00 pm
Place: 5310 Chamberlin Hall or
Speaker: Avani Vivrekar, Physics PhD Graduate Student
Abstract: In my prelim exam, I will discuss Andreev spin qubits, a novel super-semi hybrid platform for quantum computation. Proximitized germanium (Ge) heterostructures are a promising host platform for Andreev qubits due to their strong spin-orbit coupling, high mobility, and naturally low nuclear spin abundance. A key distinction between Ge and traditional materials used for Andreev qubits, such as indium arsenide (InAs), is the form of their Rashba spin-orbit coupling, which is linear in momentum for InAs but cubic for Ge. In this talk, I will compare the effects of linear versus cubic spin-orbit coupling on the physics of Andreev qubits. I will also discuss the impact of charge defects on Andreev spin qubits in both InAs and Ge and explore the implications of these analyses for implementing Andreev spin qubits using Ge.
Host: Mark Friesen
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