Single-photon-added coherent state-based postselected weak measurement
We investigated precision measurements in a two-level system coupled to a single-photon-added coherent state (SPACS) under postselected weak measurement. We analyzed strategies for improving measurement precision, including parameter estimation and the signal-to-noise ratio (SNR) in postselected wea...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221137972500261X |
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| author | Yi-Fang Ren Yusuf Turek |
| author_facet | Yi-Fang Ren Yusuf Turek |
| author_sort | Yi-Fang Ren |
| collection | DOAJ |
| description | We investigated precision measurements in a two-level system coupled to a single-photon-added coherent state (SPACS) under postselected weak measurement. We analyzed strategies for improving measurement precision, including parameter estimation and the signal-to-noise ratio (SNR) in postselected weak measurements, using the photon statistics of SPACS as the meter. Our results demonstrate that SPACS-based postselected weak measurements can outperform conventional measurement schemes in terms of precision. Additionally, we explicitly introduced an alternative weak measurement method, which is commonly applied in dispersive light-atom interactions. Our work presents a novel approach to addressing fundamental issues in quantum precision measurement based on photon statistics, and it provides a method for extracting the photon and phase shifts of radiation fields through the weak values of system observables. |
| format | Article |
| id | doaj-art-e7dbecd99c4a4757b90ee17dd83d8ea3 |
| institution | Kabale University |
| issn | 2211-3797 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj-art-e7dbecd99c4a4757b90ee17dd83d8ea32025-08-20T03:58:07ZengElsevierResults in Physics2211-37972025-09-017610836710.1016/j.rinp.2025.108367Single-photon-added coherent state-based postselected weak measurementYi-Fang Ren0Yusuf Turek1School of Physics, Liaoning University, Shenyang, Liaoning 110036, ChinaCorresponding author.; School of Physics, Liaoning University, Shenyang, Liaoning 110036, ChinaWe investigated precision measurements in a two-level system coupled to a single-photon-added coherent state (SPACS) under postselected weak measurement. We analyzed strategies for improving measurement precision, including parameter estimation and the signal-to-noise ratio (SNR) in postselected weak measurements, using the photon statistics of SPACS as the meter. Our results demonstrate that SPACS-based postselected weak measurements can outperform conventional measurement schemes in terms of precision. Additionally, we explicitly introduced an alternative weak measurement method, which is commonly applied in dispersive light-atom interactions. Our work presents a novel approach to addressing fundamental issues in quantum precision measurement based on photon statistics, and it provides a method for extracting the photon and phase shifts of radiation fields through the weak values of system observables.http://www.sciencedirect.com/science/article/pii/S221137972500261XPostselected measurementWeak valuePrecision measurementFisher information |
| spellingShingle | Yi-Fang Ren Yusuf Turek Single-photon-added coherent state-based postselected weak measurement Results in Physics Postselected measurement Weak value Precision measurement Fisher information |
| title | Single-photon-added coherent state-based postselected weak measurement |
| title_full | Single-photon-added coherent state-based postselected weak measurement |
| title_fullStr | Single-photon-added coherent state-based postselected weak measurement |
| title_full_unstemmed | Single-photon-added coherent state-based postselected weak measurement |
| title_short | Single-photon-added coherent state-based postselected weak measurement |
| title_sort | single photon added coherent state based postselected weak measurement |
| topic | Postselected measurement Weak value Precision measurement Fisher information |
| url | http://www.sciencedirect.com/science/article/pii/S221137972500261X |
| work_keys_str_mv | AT yifangren singlephotonaddedcoherentstatebasedpostselectedweakmeasurement AT yusufturek singlephotonaddedcoherentstatebasedpostselectedweakmeasurement |