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• W3128696476 endingPage "053001" @default.
• W3128696476 startingPage "053001" @default.
• W3128696476 abstract "Abstract There is rapidly expanding interest in exploiting the spin of valence-band holes rather than conduction-band electrons for spin qubit semiconductor circuits composed of coupled quantum dots. The hole platform offers stronger spin–orbit interaction (SOI), large difference between in-dot-plane and out-of-dot-plane g -factors, i.e. g -factor anisotropy, and a significantly reduced hyperfine coupling to nuclei in the host material. These attributes collectively can deliver fast all-electric coherent spin manipulation, efficient spin-flip inter-dot tunneling channels, a voltage tunable effective g -factor, a g -factor adjustable to nearly zero in an appropriately oriented external magnetic field, and long spin relaxation and coherence times. Here, we review our recent work on the physics of heavy holes confined in a planar GaAs/AlGaAs double quantum dot system with strong SOI. For a single-hole , we have performed resonant tunneling magneto-spectroscopy to extract spin-flip and spin-conserving tunneling strengths, implemented spin-flip Landau–Zener–Stückelberg–Majorana (LZSM) interferometry, determined the spin relaxation time T 1 as a function of magnetic field using a fast single-shot latched charge technique, electrically tuned the effective g -factor revealed by electric dipole spin resonance, and found signatures of the hyperfine interaction and dynamic nuclear polarization with holes. For two-holes , we have measured the energy spectrum in the presence of strong SOI (and so not limited by Pauli spin blockade), quantified the heavy-hole (HH) g -factor anisotropy on tilting the magnetic field, described a scheme to employ HHs whose g -factor is tunable to nearly zero for an in-plane magnetic field for a coherent photon-to-spin interface, and observed a well-defined LZSM interference pattern at small magnetic fields on pulsing through the singlet-triplet anti-crossing." @default.
• W3128696476 created "2021-02-15" @default.
• W3128696476 creator A5013543303 @default.
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• W3128696476 creator A5088551084 @default.
• W3128696476 date "2021-04-06" @default.
• W3128696476 modified "2023-09-26" @default.
• W3128696476 title "Single-hole physics in GaAs/AlGaAs double quantum dot system with strong spin–orbit interaction" @default.
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