Feedback Pulses ...
We have a new paradigm to design NMR pulses. Pulses, we call feedback pulses. We want broadband inversion and excitation. We have many offsets, start evolving them all starting from the north pole. Monitor them on the Bloch sphere, see which offset is worst (most away from south pole). Change the rf...
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Online Access: | https://dx.doi.org/10.48550/arxiv.2402.00058 https://arxiv.org/abs/2402.00058 |
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ftdatacite:10.48550/arxiv.2402.00058 2024-03-31T07:54:26+00:00 Feedback Pulses ... Kaushik, Vishesh Khaneja, Navin 2024 https://dx.doi.org/10.48550/arxiv.2402.00058 https://arxiv.org/abs/2402.00058 unknown arXiv Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 Quantum Physics quant-ph Instrumentation and Detectors physics.ins-det FOS Physical sciences article Preprint Article CreativeWork 2024 ftdatacite https://doi.org/10.48550/arxiv.2402.00058 2024-03-04T11:41:20Z We have a new paradigm to design NMR pulses. Pulses, we call feedback pulses. We want broadband inversion and excitation. We have many offsets, start evolving them all starting from the north pole. Monitor them on the Bloch sphere, see which offset is worst (most away from south pole). Change the rf-phase to the offset ($π/2$ ahead of offset transverse magnetization phase) and irradiate at that offset frequency and evolve for some time and monitor and repeat, looking for worst offset. When we are on resonance to a offset, we are doing well, inverting it and when we are off resonant, we don't hurt much (even if hurt little, we will come back to the offset in good time). By the process of monitoring, and setting phase we eventually push everything to the south pole and bingo, we have an inversion pulse. Feedback is done in simulation, but what results in end is a broadband inversion pulse. For broadband excitation, start with all offsets (symmetric around origin) on y axis. By feedback push them to the south ... : 16 pgs, 5 figures ... Report North Pole South pole DataCite Metadata Store (German National Library of Science and Technology) North Pole South Pole |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
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unknown |
topic |
Quantum Physics quant-ph Instrumentation and Detectors physics.ins-det FOS Physical sciences |
spellingShingle |
Quantum Physics quant-ph Instrumentation and Detectors physics.ins-det FOS Physical sciences Kaushik, Vishesh Khaneja, Navin Feedback Pulses ... |
topic_facet |
Quantum Physics quant-ph Instrumentation and Detectors physics.ins-det FOS Physical sciences |
description |
We have a new paradigm to design NMR pulses. Pulses, we call feedback pulses. We want broadband inversion and excitation. We have many offsets, start evolving them all starting from the north pole. Monitor them on the Bloch sphere, see which offset is worst (most away from south pole). Change the rf-phase to the offset ($π/2$ ahead of offset transverse magnetization phase) and irradiate at that offset frequency and evolve for some time and monitor and repeat, looking for worst offset. When we are on resonance to a offset, we are doing well, inverting it and when we are off resonant, we don't hurt much (even if hurt little, we will come back to the offset in good time). By the process of monitoring, and setting phase we eventually push everything to the south pole and bingo, we have an inversion pulse. Feedback is done in simulation, but what results in end is a broadband inversion pulse. For broadband excitation, start with all offsets (symmetric around origin) on y axis. By feedback push them to the south ... : 16 pgs, 5 figures ... |
format |
Report |
author |
Kaushik, Vishesh Khaneja, Navin |
author_facet |
Kaushik, Vishesh Khaneja, Navin |
author_sort |
Kaushik, Vishesh |
title |
Feedback Pulses ... |
title_short |
Feedback Pulses ... |
title_full |
Feedback Pulses ... |
title_fullStr |
Feedback Pulses ... |
title_full_unstemmed |
Feedback Pulses ... |
title_sort |
feedback pulses ... |
publisher |
arXiv |
publishDate |
2024 |
url |
https://dx.doi.org/10.48550/arxiv.2402.00058 https://arxiv.org/abs/2402.00058 |
geographic |
North Pole South Pole |
geographic_facet |
North Pole South Pole |
genre |
North Pole South pole |
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North Pole South pole |
op_rights |
Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 |
op_doi |
https://doi.org/10.48550/arxiv.2402.00058 |
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1795035299444686848 |