دورية أكاديمية
Optimal control for quantum detectors
| العنوان: | Optimal control for quantum detectors |
|---|---|
| المؤلفون: | Paraj Titum, Kevin Schultz, Alireza Seif, Gregory Quiroz, B. D. Clader |
| المصدر: | npj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021) |
| بيانات النشر: | Nature Portfolio, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Physics LCC:Electronic computers. Computer science |
| مصطلحات موضوعية: | Physics, QC1-999, Electronic computers. Computer science, QA75.5-76.95 |
| الوصف: | Abstract Quantum systems are promising candidates for sensing of weak signals as they can be highly sensitive to external perturbations, thus providing excellent performance when estimating parameters of external fields. However, when trying to detect weak signals that are hidden by background noise, the signal-to-noise ratio is a more relevant metric than raw sensitivity. We identify, under modest assumptions about the statistical properties of the signal and noise, the optimal quantum control to detect an external signal in the presence of background noise using a quantum sensor. Interestingly, for white background noise, the optimal solution is the simple and well-known spin-locking control scheme. Using numerical techniques, we further generalize these results to the case of background noise with a Lorentzian spectrum. We show that for increasing correlation time, pulse based sequences, such as CPMG, are also close to the optimal control for detecting the signal, with the crossover dependent on the signal frequency. These results show that an optimal detection scheme can be easily implemented in near-term quantum sensors without the need for complicated pulse shaping. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2056-6387 |
| Relation: | https://doaj.org/toc/2056-6387 |
| DOI: | 10.1038/s41534-021-00383-5 |
| URL الوصول: | https://doaj.org/article/4dc5edd92d3547f88fe1b2ff37e3c42c |
| رقم الأكسشن: | edsdoj.4dc5edd92d3547f88fe1b2ff37e3c42c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20566387 |
|---|---|
| DOI: | 10.1038/s41534-021-00383-5 |