Synthesising quantum states of sound and listening to what they tell us about the universe

合成声音的量子态并聆听它们告诉我们关于宇宙的信息

• 批准号: ST/W006553/1
• 负责人: Michael Vanner
• 金额: $ 51.62万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FW006553%2F1
• 关键词: Synthesising; quantum; states; sound; listening

The Schrodinger-cat thought experiment infamously highlights how bizarre quantum mechanics can be and just how little we know about the fuzzy boundary between the quantum and classical aspects of our world. Using quantum technologies and our now exquisite ability to control the quantum aspects of light, this project will illuminate and examine this boundary by creating quantum states of high-frequency sound waves in a tiny crystal cooled to near absolute zero in temperature. These quantum sound waves will comprise trillions of atoms--a mass-scale that is truly gigantic from the perspective of the quantum realm, which usually only contains a very small number of particles or atoms, but is just on the edge of our everyday world, as that mass would make up just a small fraction of a single feline hair. Generating and studying quantum behaviour at this mass-scale will act as a new and powerful lens through which we can examine the very foundations of physics and shed much needed light on: Why do we not see quantum behaviour in our everyday world? Why are quantum states so fragile? And, does gravity even play a role at this mysterious boundary?

薛定谔猫思想实验臭名昭著地强调了量子力学是多么奇怪，以及我们对世界的量子和经典方面之间的模糊界限知之甚少。利用量子技术和我们现在控制光量子方面的精湛能力，该项目将通过在冷却到接近绝对零温度的微小晶体中创建高频声波的量子态来照亮和检查这一边界。这些量子声波将包含数万亿个原子——从量子领域的角度来看，这个质量规模确实是巨大的，通常只包含极少数的粒子或原子，但就在我们日常世界的边缘，因为该质量只占一根猫科动物毛发的一小部分。在这种质量尺度上产生和研究量子行为将成为一个新的、强大的镜头，通过它我们可以检查物理学的基础，并揭示出急需的线索：为什么我们在日常生活中看不到量子行为？为什么量子态如此脆弱？而且，重力在这个神秘的边界上起作用吗？

项目成果

Cavity Quantum Optomechanical Nonlinearities and Position Measurement beyond the Breakdown of the Linearized Approximation.

腔量子光机械非线性和超越线性近似的位置测量。

• DOI: http://dx.10.1103/physrevlett.131.053601
• 发表时间: 2023
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Clarke J

Second-order coherence across the Brillouin lasing threshold

跨布里渊激光阈值的二阶相干性

• DOI: http://dx.10.1364/optica.501089
• 发表时间: 2023
• 期刊: Optica
• 影响因子: 10.4
• 作者: Cryer

Gravity mediated entanglement between light beams as a table-top test of quantum gravity

光束之间的重力介导纠缠作为量子引力的桌面测试

• DOI: http://dx.10.48550/arxiv.2210.12713
• 发表时间: 2022
• 作者: Aimet S