Optimal Control for One-Qubit Quantum Sensing
Quantum systems can be exquisite sensors thanks to their sensitivity to external perturbations. This same characteristic also makes them fragile to external noise. Quantum control can tackle the challenge of protecting a quantum sensor from environmental noise, while strongly coupling the sensor wit...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/116279 https://orcid.org/0000-0003-3207-594X |
| _version_ | 1826216384967737344 |
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| author | Poggiali, F. Fabbri, N. Cappellaro, Paola |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Poggiali, F. Fabbri, N. Cappellaro, Paola |
| author_sort | Poggiali, F. |
| collection | MIT |
| description | Quantum systems can be exquisite sensors thanks to their sensitivity to external perturbations. This same characteristic also makes them fragile to external noise. Quantum control can tackle the challenge of protecting a quantum sensor from environmental noise, while strongly coupling the sensor with the field to be measured. As the compromise between these two conflicting requirements does not always have an intuitive solution, optimal control based on a numerical search could prove very effective. Here, we adapt optimal control theory to the quantum-sensing scenario by introducing a cost function that, unlike the usual fidelity of operation, correctly takes into account both the field to be measured and the environmental noise. We experimentally implement this novel control paradigm using a nitrogen vacancy center in diamond, finding improved sensitivity to a broad set of time-varying fields. The demonstrated robustness and efficiency of the numerical optimization, as well as the sensitivity advantage it bestows, will prove beneficial to many quantum-sensing applications. |
| first_indexed | 2024-09-23T16:46:48Z |
| format | Article |
| id | mit-1721.1/116279 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:46:48Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1162792022-10-03T08:15:04Z Optimal Control for One-Qubit Quantum Sensing Poggiali, F. Fabbri, N. Cappellaro, Paola Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Cappellaro, Paola Quantum systems can be exquisite sensors thanks to their sensitivity to external perturbations. This same characteristic also makes them fragile to external noise. Quantum control can tackle the challenge of protecting a quantum sensor from environmental noise, while strongly coupling the sensor with the field to be measured. As the compromise between these two conflicting requirements does not always have an intuitive solution, optimal control based on a numerical search could prove very effective. Here, we adapt optimal control theory to the quantum-sensing scenario by introducing a cost function that, unlike the usual fidelity of operation, correctly takes into account both the field to be measured and the environmental noise. We experimentally implement this novel control paradigm using a nitrogen vacancy center in diamond, finding improved sensitivity to a broad set of time-varying fields. The demonstrated robustness and efficiency of the numerical optimization, as well as the sensitivity advantage it bestows, will prove beneficial to many quantum-sensing applications. 2018-06-12T18:44:31Z 2018-06-12T18:44:31Z 2018-06 2018-04 2018-06-08T18:00:24Z Article http://purl.org/eprint/type/JournalArticle 2160-3308 http://hdl.handle.net/1721.1/116279 Poggiali, F. et al. "Optimal Control for One-Qubit Quantum Sensing." Physical Review X 8, 2 (June 2018): 021059 https://orcid.org/0000-0003-3207-594X en http://dx.doi.org/10.1103/PhysRevX.8.021059 Physical Review X Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 application/pdf American Physical Society American Physical Society |
| spellingShingle | Poggiali, F. Fabbri, N. Cappellaro, Paola Optimal Control for One-Qubit Quantum Sensing |
| title | Optimal Control for One-Qubit Quantum Sensing |
| title_full | Optimal Control for One-Qubit Quantum Sensing |
| title_fullStr | Optimal Control for One-Qubit Quantum Sensing |
| title_full_unstemmed | Optimal Control for One-Qubit Quantum Sensing |
| title_short | Optimal Control for One-Qubit Quantum Sensing |
| title_sort | optimal control for one qubit quantum sensing |
| url | http://hdl.handle.net/1721.1/116279 https://orcid.org/0000-0003-3207-594X |
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