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• W3103082009 abstract "The spin states of electrons confined in semiconductor quantum dots form a promising platform for quantum computation. Recent studies of silicon CMOS qubits have shown coherent manipulation of electron spin states with extremely high fidelity. However, manipulation of single electron spins requires large oscillatory magnetic fields to be generated on-chip, making it difficult to address individual qubits when scaling up to multi-qubit devices. The spin-orbit interaction allows spin states to be controlled with electric fields, which act locally and are easier to generate. While the spin-orbit interaction is weak for electrons in silicon, valence band holes have an inherently strong spin-orbit interaction. However, creating silicon quantum dots in which a single hole can be localised, in an architecture that is suitable for scale-up to a large number of qubits, is a challenge. Here we report a silicon quantum dot, with an integrated charge sensor, that can be operated down to the last hole. We map the spin states and orbital structure of the first six holes, and show they follow the Fock-Darwin spectrum. We also find that hole-hole interactions are extremely strong, reducing the two-hole singlet-triplet splitting by 90% compared to the single particle level spacing of 3.5 meV. These results provide a route to single hole spin quantum bits in a planar silicon CMOS architecture." @default.
• W3103082009 created "2020-11-23" @default.
• W3103082009 creator A5010422379 @default.
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• W3103082009 date "2018-08-14" @default.
• W3103082009 modified "2023-10-14" @default.
• W3103082009 title "Spin and orbital structure of the first six holes in a silicon metal-oxide-semiconductor quantum dot" @default.
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• W3103082009 doi "https://doi.org/10.1038/s41467-018-05700-9" @default.
• W3103082009 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6092405" @default.
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