Uniform microwave field formation for control of ensembles of negatively charged nitrogen vacancy in diamond
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911680060981248 |
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| author | Rezinkin, Oleg Rezinkina, Marina Kitamura, Takuya Paul, Rajan Jelezko, Fedor |
| author_facet | Rezinkin, Oleg Rezinkina, Marina Kitamura, Takuya Paul, Rajan Jelezko, Fedor |
| contents | The homogeneity of the microwave magnetic field is essential in controlling a large volume of ensemble spins, for example, in the case of sensitive magnetometry with nitrogen-vacancy (NV) centers in diamond. This is particularly important for pulsed measurement, where the fidelity of control pulses plays a crucial role in its sensitivity. So far, several magnetic field-forming systems have been proposed, but no detailed comparison has been made. Here, we numerically study the homogeneity of five different systems, including a planar antenna, a dielectric resonator, a cylindrical inductor, a barrel-shaped coil, and a nested barrel-shaped coil. The results of the simulation allowed us to optimize the design parameters of the barrel-shaped field-forming system, which led to significantly improved magnetic field uniformity. To measure this effect, we experimentally compared the homogeneity of a field-forming system having a barrel shape with that of a planar field-forming system by measuring Rabi oscillations of an ensemble of NV centers with them. Significant improvements in inhomogeneity were confirmed in the barrel-shaped coil. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_13267 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Uniform microwave field formation for control of ensembles of negatively charged nitrogen vacancy in diamond Rezinkin, Oleg Rezinkina, Marina Kitamura, Takuya Paul, Rajan Jelezko, Fedor Quantum Physics The homogeneity of the microwave magnetic field is essential in controlling a large volume of ensemble spins, for example, in the case of sensitive magnetometry with nitrogen-vacancy (NV) centers in diamond. This is particularly important for pulsed measurement, where the fidelity of control pulses plays a crucial role in its sensitivity. So far, several magnetic field-forming systems have been proposed, but no detailed comparison has been made. Here, we numerically study the homogeneity of five different systems, including a planar antenna, a dielectric resonator, a cylindrical inductor, a barrel-shaped coil, and a nested barrel-shaped coil. The results of the simulation allowed us to optimize the design parameters of the barrel-shaped field-forming system, which led to significantly improved magnetic field uniformity. To measure this effect, we experimentally compared the homogeneity of a field-forming system having a barrel shape with that of a planar field-forming system by measuring Rabi oscillations of an ensemble of NV centers with them. Significant improvements in inhomogeneity were confirmed in the barrel-shaped coil. |
| title | Uniform microwave field formation for control of ensembles of negatively charged nitrogen vacancy in diamond |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.13267 |