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PreprintCC BY 4.0arXiv

Enhanced weak-field sensing using detuned squeezing

  • Li-Wen Zhang
  • Yang Liu
  • Han-Jie Zhu
  • Wei Qin
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Abstract

Achieving measurement precision beyond the standard quantum limit (SQL) is a fundamental object in quantum metrology. In this manuscript, we propose a streamlined protocol for weak signal sensing in a trapped-ion spin-oscillator system that simultaneously exploits detuned motional squeezing and spin-oscillator entanglement. By combining these two quantum resources, the phase accumulation in this spin system is significantly accelerated, as a result achieving an exponential improvement in the sensitivity over unsqueezed cases. Remarkably, we show that the significant metrological gain provided by our protocol persists in noisy environments, with the sensitivity remaining below the SQL. In particular, our protocol retains a distinct advantage in the short interrogation time regime, thus demonstrating the practical potential in quantum-enhanced sensing.

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Cite

BibTeXRIS
BibTeX
@misc{zhang2026enhanced,
  title = {{Enhanced weak-field sensing using detuned squeezing}},
  author = {Li-Wen Zhang and Yang Liu and Han-Jie Zhu and Wei Qin},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.17682},
  eprint = {2610.17682},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.17682},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Enhanced weak-field sensing using detuned squeezing
AU  - Li-Wen Zhang
AU  - Yang Liu
AU  - Han-Jie Zhu
AU  - Wei Qin
PY  - 2026
DA  - 2026/10/13
PB  - arXiv
DO  - 10.48550/arxiv.2610.17682
UR  - https://arxiv.org/abs/2610.17682
AB  - Achieving measurement precision beyond the standard quantum limit (SQL) is a fundamental object in quantum metrology. In this manuscript, we propose a streamlined protocol for weak signal sensing in a trapped-ion spin-oscillator system that simultaneously exploits detuned motional squeezing and spin-oscillator entanglement. By combining these two quantum resources, the phase accumulation in this spin system is significantly accelerated, as a result achieving an exponential improvement in the sensitivity over unsqueezed cases. Remarkably, we show that the significant metrological gain provided by our protocol persists in noisy environments, with the sensitivity remaining below the SQL. In particular, our protocol retains a distinct advantage in the short interrogation time regime, thus demonstrating the practical potential in quantum-enhanced sensing.
ER  -