Correlations of spin splitting and orbital fluctuations due to 1/f charge noise in the Si/SiGe Quantum Dot
| Title: | Correlations of spin splitting and orbital fluctuations due to 1/f charge noise in the Si/SiGe Quantum Dot |
|---|---|
| Authors: | Kępa, Marcin, Cywiński, Łukasz, Krzywda, Jan A. |
| Source: | Appl. Phys. Lett. 123, 034003 (2023) |
| Publication Year: | 2023 |
| Collection: | Condensed Matter |
| Subject Terms: | Condensed Matter - Mesoscale and Nanoscale Physics |
| More Details: | Fluctuations of electric fields can change the position of a gate-defined quantum dot in a semiconductor heterostructure. In the presence of magnetic field gradient, these stochastic shifts of electron's wavefunction lead to fluctuations of electron's spin splitting. The resulting spin dephasing due to charge noise limits the coherence times of spin qubits in isotopically purified Si/SiGe quantum dots. We investigate the spin splitting noise caused by such process caused by microscopic motion of charges at the semiconductor-oxide interface. We compare effects of isotropic and planar displacement of the charges, and estimate their densities and typical displacement magnitudes that can reproduce experimentally observed spin splitting noise spectra. We predict that for defect density of $10^{10}$ cm$^{-2}$, visible correlations between noises in spin splitting and in energy of electron's ground state in the quantum dot, are expected. Comment: 6 pages, 4 figures, added repository: https://doi.org/10.24435/materialscloud:91-mj |
| Document Type: | Working Paper |
| DOI: | 10.1063/5.0156358 |
| Access URL: | http://arxiv.org/abs/2305.06011 |
| Accession Number: | edsarx.2305.06011 |
| Database: | arXiv |
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| Items | – Name: Title Label: Title Group: Ti Data: Correlations of spin splitting and orbital fluctuations due to 1/f charge noise in the Si/SiGe Quantum Dot – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kępa%2C+Marcin%22">Kępa, Marcin</searchLink><br /><searchLink fieldCode="AR" term="%22Cywiński%2C+Łukasz%22">Cywiński, Łukasz</searchLink><br /><searchLink fieldCode="AR" term="%22Krzywda%2C+Jan+A%2E%22">Krzywda, Jan A.</searchLink> – Name: TitleSource Label: Source Group: Src Data: Appl. Phys. Lett. 123, 034003 (2023) – Name: DatePubCY Label: Publication Year Group: Date Data: 2023 – Name: Subset Label: Collection Group: HoldingsInfo Data: Condensed Matter – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Condensed+Matter+-+Mesoscale+and+Nanoscale+Physics%22">Condensed Matter - Mesoscale and Nanoscale Physics</searchLink> – Name: Abstract Label: Description Group: Ab Data: Fluctuations of electric fields can change the position of a gate-defined quantum dot in a semiconductor heterostructure. In the presence of magnetic field gradient, these stochastic shifts of electron's wavefunction lead to fluctuations of electron's spin splitting. The resulting spin dephasing due to charge noise limits the coherence times of spin qubits in isotopically purified Si/SiGe quantum dots. We investigate the spin splitting noise caused by such process caused by microscopic motion of charges at the semiconductor-oxide interface. We compare effects of isotropic and planar displacement of the charges, and estimate their densities and typical displacement magnitudes that can reproduce experimentally observed spin splitting noise spectra. We predict that for defect density of $10^{10}$ cm$^{-2}$, visible correlations between noises in spin splitting and in energy of electron's ground state in the quantum dot, are expected.<br />Comment: 6 pages, 4 figures, added repository: https://doi.org/10.24435/materialscloud:91-mj – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1063/5.0156358 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2305.06011" linkWindow="_blank">http://arxiv.org/abs/2305.06011</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.2305.06011 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1063/5.0156358 Subjects: – SubjectFull: Condensed Matter - Mesoscale and Nanoscale Physics Type: general Titles: – TitleFull: Correlations of spin splitting and orbital fluctuations due to 1/f charge noise in the Si/SiGe Quantum Dot Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kępa, Marcin – PersonEntity: Name: NameFull: Cywiński, Łukasz – PersonEntity: Name: NameFull: Krzywda, Jan A. IsPartOfRelationships: – BibEntity: Dates: – D: 10 M: 05 Type: published Y: 2023 |
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