Quantum Interferometer Combining Squeezing and Parametric Amplification
| Autor: | Jingxu Ma, Kunchi Peng, Yanni Feng, Xiaojun Jia, Zhihui Yan, Changde Xie, Xiaojie Zuo |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics business.industry Quantum limit Quantum noise Astrophysics::Instrumentation and Methods for Astrophysics Shot noise FOS: Physical sciences General Physics and Astronomy Interferometry Optics Quantum state Astronomical interferometer Sensitivity (control systems) Quantum Physics (quant-ph) business Quantum |
| Zdroj: | Physical review letters. 124(17) |
| ISSN: | 1079-7114 |
| Popis: | High precision interferometers are the building blocks of precision metrology and the ultimate interferometric sensitivity is limited by the quantum noise. Here we propose and experimentally demonstrate a compact quantum interferometer involving two optical parametric amplifiers and the squeezed states generated within the interferometer are directly used for the phase-sensing quantum state. By both squeezing shot noise and amplifying phase-sensing intensity the sensitivity improvement of $4.86\pm 0.24$ dB beyond the standard quantum limit is deterministically realized and a minimum detectable phase smaller than that of all present interferometers under the same phase-sensing intensity is achieved. This interferometric system has significantly potential applications in a variety of measurements for tiny variances of physical quantities. Comment: 6 pages,3 figures |
| Databáze: | OpenAIRE |
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