Optimal Pulse-Budget for Silicon Spin Qubits A practical stability guideline for Delft/Intel-type devices
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| Natura: | Recurso digital |
| Lingua: | inglese |
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Zenodo
2025
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| _version_ | 1866901344942555136 |
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| author | Lami, Faical |
| author_facet | Lami, Faical |
| contents | <p>Long pulse sequences in silicon spin qubits frequently exhibit an abrupt and poorly understood loss of coherence after a finite number of operations, despite stable short-sequence calibration. This work identifies and quantifies a narrow operational stability window governing long-sequence performance in Delft/Intel-class Si/SiGe spin-qubit devices.</p> <p> </p> <p>Using only externally observable experimental signatures, the report establishes three actionable thresholds: a maximum stable pulse count, an optimal drive-amplitude window, and a safe detuning band relative to the charge-noise sweet spot. For representative Delft-class devices (T₂ ≈ 76 µs, Δt ≈ 7 µs), stable operation is limited to approximately 280–340 consecutive pulses, with peak stability occurring at a normalized drive amplitude s ≈ 0.31 ± 0.02 and detuning |δ| ≤ 60 kHz.</p> <p> </p> <p>Unlike prior studies that model decoherence as monotonic decay, this work identifies a critical transition where phase variance accelerates superlinearly, leading to rapid fidelity loss. A fully reproducible, execution-only calibration protocol is provided, enabling independent laboratories to locate their own stability envelope in under two hours of lab time.</p> <p> </p> <p>The results require no hardware modification, no theoretical assumptions, and no reference to internal analysis frameworks. This document is intended for direct experimental use and serves as a validation reference for production-grade operational envelopes in silicon spin-qubit plat</p> <p>forms.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17914559 |
| institution | Zenodo |
| language | eng |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Optimal Pulse-Budget for Silicon Spin Qubits A practical stability guideline for Delft/Intel-type devices Lami, Faical quantum control Si/SiGe decoherence silicon spin qubits pulse sequences long-sequence stability quantum hardware calibration detuning stability Rabi drive charge noise quantum device engineering <p>Long pulse sequences in silicon spin qubits frequently exhibit an abrupt and poorly understood loss of coherence after a finite number of operations, despite stable short-sequence calibration. This work identifies and quantifies a narrow operational stability window governing long-sequence performance in Delft/Intel-class Si/SiGe spin-qubit devices.</p> <p> </p> <p>Using only externally observable experimental signatures, the report establishes three actionable thresholds: a maximum stable pulse count, an optimal drive-amplitude window, and a safe detuning band relative to the charge-noise sweet spot. For representative Delft-class devices (T₂ ≈ 76 µs, Δt ≈ 7 µs), stable operation is limited to approximately 280–340 consecutive pulses, with peak stability occurring at a normalized drive amplitude s ≈ 0.31 ± 0.02 and detuning |δ| ≤ 60 kHz.</p> <p> </p> <p>Unlike prior studies that model decoherence as monotonic decay, this work identifies a critical transition where phase variance accelerates superlinearly, leading to rapid fidelity loss. A fully reproducible, execution-only calibration protocol is provided, enabling independent laboratories to locate their own stability envelope in under two hours of lab time.</p> <p> </p> <p>The results require no hardware modification, no theoretical assumptions, and no reference to internal analysis frameworks. This document is intended for direct experimental use and serves as a validation reference for production-grade operational envelopes in silicon spin-qubit plat</p> <p>forms.</p> |
| title | Optimal Pulse-Budget for Silicon Spin Qubits A practical stability guideline for Delft/Intel-type devices |
| topic | quantum control Si/SiGe decoherence silicon spin qubits pulse sequences long-sequence stability quantum hardware calibration detuning stability Rabi drive charge noise quantum device engineering |
| url | https://doi.org/10.5281/zenodo.17914559 |