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Approaching Ideal Visibility in Singlet-Triplet Qubit Operations Using Energy-Selective Tunneling-Based Hamiltonian Estimation
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Jehyun | - |
dc.contributor.author | Yun, Jonginn | - |
dc.contributor.author | Jang, Wonjin | - |
dc.contributor.author | Jang, Hyeongyu | - |
dc.contributor.author | Park, Jaemin | - |
dc.contributor.author | Song, Younguk | - |
dc.contributor.author | Cho, Min-Kyun | - |
dc.contributor.author | Sim, Sangwoo | - |
dc.contributor.author | Sohn, Hanseo | - |
dc.contributor.author | Jung, Hwanchul | - |
dc.contributor.author | Umansky, Vladimir | - |
dc.contributor.author | Kim, Dohun | - |
dc.date.accessioned | 2024-05-27T08:23:09Z | - |
dc.date.available | 2024-05-27T08:23:09Z | - |
dc.date.created | 2022-08-19 | - |
dc.date.created | 2022-08-19 | - |
dc.date.created | 2022-08-19 | - |
dc.date.issued | 2022-07 | - |
dc.identifier.citation | Physical Review Letters, Vol.129 No.4, p. 040501 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | https://hdl.handle.net/10371/203641 | - |
dc.description.abstract | We report energy-selective tunneling readout-based Hamiltonian parameter estimation of a two-electron spin qubit in a GaAs quantum dot array. Optimization of readout fidelity enables a single-shot measurement time of 16 μs on average, with adaptive initialization and efficient qubit frequency estimation based on real-time Bayesian inference. For qubit operation in a frequency heralded mode, we observe a 40-fold increase in coherence time without resorting to dynamic nuclear polarization. We also demonstrate active frequency feedback with quantum oscillation visibility, single-shot measurement fidelity, and gate fidelity of 97.7%, 99%, and 99.6%, respectively, showcasing the improvements in the overall capabilities of GaAs-based spin qubits. By pushing the sensitivity of the energy-selective tunneling-based spin to charge conversion to the limit, the technique is useful for advanced quantum control protocols such as error mitigation schemes, where fast qubit parameter calibration with a large signal-to-noise ratio is crucial. | - |
dc.language | 영어 | - |
dc.publisher | American Physical Society | - |
dc.title | Approaching Ideal Visibility in Singlet-Triplet Qubit Operations Using Energy-Selective Tunneling-Based Hamiltonian Estimation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevLett.129.040501 | - |
dc.citation.journaltitle | Physical Review Letters | - |
dc.identifier.wosid | 000840947600005 | - |
dc.identifier.scopusid | 2-s2.0-85135550197 | - |
dc.citation.number | 4 | - |
dc.citation.startpage | 040501 | - |
dc.citation.volume | 129 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Kim, Jehyun | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ELECTRON-SPIN | - |
dc.subject.keywordPlus | QUANTUM | - |
dc.subject.keywordPlus | FIDELITY | - |
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