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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.16018 |
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Table of Contents:
- Identifying quantum resources for quantum sensing is of paramount importance. Up to date, two quantum resources has been widely recognized: the number $N$ of entangled quantum probes and the coherent evolution time $T$. Here we identify the spin quantum number $S$ of high-spin systems as another quantum resource, which can improve the sensing precision of magnetic field according to the Heisenberg scaling in the absence of noises. Similar to the case of $N$ and $T$, the utility of $S$ may be degraded by environmental noises. We analyze this point sysmatically under the Ornstein-Uhlenbeck noise (a prevalent noise in realistic physical systems). We find that the utility of $S$ vanishes in Markovian noises, but survives in non-Markovian noises, where it improves the sensing precision according to the classical scaling $1/\sqrt{S}$. Super-classical scaling can be achieved by suitable control of the high-spin system.