在基础物理学、传感和换能器等多个领域，操纵宏观物体在其量子力学不确定性附近的运动一直是人们追求的目标。尽管在悬浮固体颗粒的基态冷却方面取得了进展，但实现其非经典态仍是一个难题。
研究组通过快速改变单个纳米粒子的振荡频率来演示其运动状态的量子压缩。他们发现，使用自由膨胀测量，速度方差明显收窄到基态的-4.9±0.1分贝。该工作表明，悬浮纳米颗粒为研究运动的非经典态提供了理想的平台，并为在宏观尺度上开发量子传感和探索量子力学的应用开辟了一条新途径。
附：英文原文
Title: Quantum squeezing of a levitated nanomechanical oscillator
Author: Mitsuyoshi Kamba, Naoki Hara, Kiyotaka Aikawa
Issue&Volume: 2025-09-18
Abstract: Manipulating the motion of macroscopic objects near their quantum mechanical uncertainties has been desired in diverse fields, including fundamental physics, sensing, and transducers. Despite progress in ground-state cooling of a levitated solid particle, realizing its nonclassical states has been elusive. Here, we demonstrate quantum squeezing of the motion of a single nanoparticle by rapidly varying its oscillation frequency. We reveal appreciable narrowing of the velocity variance to –4.9 ± 0.1 decibels of that of the ground state using free-expansion measurements. Our work shows that a levitated nanoparticle offers an ideal platform for studying nonclassical states of its motion and provides a route to developing applications in quantum sensing and exploring quantum mechanics at a macroscopic scale.
DOI: ady4652
Source: https://www.science.org/doi/10.1126/science.ady4652