Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.00700 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912913377198080 |
|---|---|
| author | Zhao, Zekun Kang, Qingqian Zhao, Teng Liu, Cunjin Su, Xin Hu, Liyun |
| author_facet | Zhao, Zekun Kang, Qingqian Zhao, Teng Liu, Cunjin Su, Xin Hu, Liyun |
| contents | Quantum metrology employs quantum resources to achieve measurement precision beyond classical limits. This work investigates a Mach--Zehnder interferometer incorporating a Kerr nonlinear phase shifter, with photon-added two-mode squeezed coherent states generated via four-wave mixing as input. We demonstrate that increasing both the photon-addition order and the input resource strength systematically enhances phase sensitivity, quantum Fisher information, and the corresponding quantum Cramér--Rao bound. The proposed system not only surpasses the standard quantum limit but also approaches or exceeds the Heisenberg limit for linear phase shifts, while Kerr nonlinearity enables surpassing the super-Heisenberg limit. Furthermore, the scheme exhibits enhanced robustness against photon loss, providing a promising pathway toward practical high-precision quantum metrology applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_00700 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Enhanced Phase Estimation via Photon-Added Two-Mode Squeezed States and Kerr Nonlinearity Zhao, Zekun Kang, Qingqian Zhao, Teng Liu, Cunjin Su, Xin Hu, Liyun Quantum Physics Quantum metrology employs quantum resources to achieve measurement precision beyond classical limits. This work investigates a Mach--Zehnder interferometer incorporating a Kerr nonlinear phase shifter, with photon-added two-mode squeezed coherent states generated via four-wave mixing as input. We demonstrate that increasing both the photon-addition order and the input resource strength systematically enhances phase sensitivity, quantum Fisher information, and the corresponding quantum Cramér--Rao bound. The proposed system not only surpasses the standard quantum limit but also approaches or exceeds the Heisenberg limit for linear phase shifts, while Kerr nonlinearity enables surpassing the super-Heisenberg limit. Furthermore, the scheme exhibits enhanced robustness against photon loss, providing a promising pathway toward practical high-precision quantum metrology applications. |
| title | Enhanced Phase Estimation via Photon-Added Two-Mode Squeezed States and Kerr Nonlinearity |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.00700 |