Phase-insensitive amplifier for quantum measurements

用于量子测量的相敏放大器

• 批准号: EP/V048872/1
• 负责人: Denis Martynov
• 金额: $ 25.81万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FV048872%2F1
• 关键词: Phase; insensitive; amplifier; quantum; measurements

Precision measurement has been a primary driving force for advancing modern science. In particular, optical interferometers lead to the direct detection of gravitational waves from black holes and neutron stars, and can also be applied for axion dark matter detection. But how can we further improve optical measurements? The fundamental limit to their precision comes from the quantum nature of light. The canonical approach to overcoming the quantum limit is using the non-classical squeezed state of light. After decades of developments, it becomes full-fledged, but also reaches the hard limit from the optical loss that destroys the quantum decoherence. In this project, we will explore a new paradigm using quantum amplification that complements the squeezing technique and is robust against optical loss. The novelty involves an exploration of a phase-insensitive amplification process that leads to an asymmetrical amplification of the signal and the noise in optical interferometers. We will perform the first experimental study of an optomechanical amplifier and theoretically investigate the optimal amplification scheme. Our findings can lead to a new class of quantum techniques and will have a broad impact on high-precision detectors.

精密测量一直是推动现代科学发展的主要动力。特别是，光学干涉仪可以直接探测来自黑洞和中子星的引力波，也可以应用于轴子暗物质探测。但我们如何进一步改进光学测量呢？其精度的根本限制来自于光的量子性质。克服量子极限的规范方法是使用光的非经典压缩态。经过几十年的发展，它已经成熟，但也达到了破坏量子退相干的光学损耗的硬极限。在这个项目中，我们将探索一种使用量子放大的新范例，该范例补充了压缩技术并且对光损耗具有鲁棒性。这项新颖性涉及对相位不敏感放大过程的探索，该过程导致光学干涉仪中信号和噪声的不对称放大。我们将对光机械放大器进行首次实验研究，并从理论上研究最佳放大方案。我们的发现可以催生一类新型量子技术，并对高精度探测器产生广泛影响。

项目成果

Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run

在 Advanced LIGO 和 Advanced Virgo 第三次观测运行的前半段中搜索太阳质量以下的双星

• DOI: 10.1103/physrevlett.129.061104
• 发表时间: 2022
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Abbott, R.;Abbott, T. D.;Acernese, F.;Ackley, K.;Adams, C.;Adhikari, N.;Adhikari, R. X.;Adya, V. B.;Affeldt, C.;Agarwal, D.
• 通讯作者: Agarwal, D.

Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs

在第二次和第三次 LIGO-Virgo 观测运行中搜索来自已知脉冲星的两个谐波的引力波

• DOI: 10.3847/1538-4357/ac6acf
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Abbott, R.;Abe, H.;Acernese, F.;Ackley, K.;Adhikari, N.;Adhikari, R. X.;Adkins, V. K.;Adya, V. B.;Affeldt, C.;Agarwal, D.
• 通讯作者: Agarwal, D.

Enhancing the sensitivity of interferometers with stable phase-insensitive quantum filters

使用稳定的相位不敏感量子滤波器提高干涉仪的灵敏度

• DOI: 10.1103/physrevd.106.022007
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Dmitriev A

Sensing and control scheme for the inteferometer configuration with an L-shaped resonator

L 形谐振器干涉仪配置的传感和控制方案

• DOI: 10.1088/1361-6382/ad0454
• 发表时间: 2023
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: Guo X

Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run

在 LIGO-Virgo 第三次观测中，窄带搜索来自已知脉冲星的连续且长时间的瞬态引力波

• DOI: 10.3847/1538-4357/ac6ad0
• 发表时间: 2022
• 期刊: Astrophys. J.
• 作者: B. P. Abbott;H. Shinkai;LIGO-Virgo-KAGRA collaboration
• 通讯作者: LIGO-Virgo-KAGRA collaboration