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High-quality quantum point contact in two-dimensional GaAs (311)A hole system
J. Shabani, J. R. Petta, M. Shayegan
We studied ballistic transport across a quantum point contact (QPC) defined in a high-quality, GaAs (311)A two-dimensional (2D) hole system using shallow etching and top-gating. Th…
Suppressing Spin Qubit Dephasing by Nuclear State Preparation
D. J. Reilly, J. M. Taylor, J. R. Petta +3
Coherent spin states in semiconductor quantum dots offer promise as electrically controllable quantum bits (qubits) with scalable fabrication. For few-electron quantum dots made fr…
Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot
D. J. Reilly, J. M. Taylor, J. R. Petta +3
Coherent two-level systems, or qubits, based on electron spins in GaAs quantum dots are strongly coupled to the nuclear spins of the host lattice via the hyperfine interaction. Rea…