科学家创建世界上旋转速度最快的物体 速度达每分钟3000亿转

最新评论

yyyi_w 2020-01-18 23:03

科学的探索永无止境。。。

likaihit 2020-01-19 00:08

这些图是怎么画的

redplum 2020-01-19 00:08

有意思啊

星空38 2020-01-19 00:40

研究人员表示，除了打破世界纪录之外，这种设备还可以用来测量诸如真空摩擦和纳米级磁性等量子效应。

mang2004 2020-01-19 01:03

Ultrasensitive torque detection with an optically levitated nanorotor J[}H^FR  
Abstract xpdpD  
Torque sensors such as the torsion balance enabled the first determination of the gravitational constant by Henri Cavendish and the discovery of Coulomb’s law. Torque sensors are also widely used in studying small-scale magnetism, the Casimir effect and other applications. Great effort has been made to improve the torque detection sensitivity by nanofabrication and cryogenic cooling. Until now, the most sensitive torque sensor has achieved a remarkable sensitivity of 2.9 × 10−24 N m Hz−1/2 at millikelvin temperatures in a dilution refrigerator. Here, we show a torque sensor reaching sensitivity of (4.2 ± 1.2) × 10−27 N m Hz−1/2 at room temperature. It is created by an optically levitated nanoparticle in vacuum. Our system does not require complex nanofabrication. Moreover, we drive a nanoparticle to rotate at a record high speed beyond 5 GHz (300 billion r.p.m.). Our calculations show that this system will be able to detect the long sought after vacuum friction near a surface under realistic conditions. The optically levitated nanorotor will also have applications in studying nanoscale magnetism and the quantum geometric phase. TgkVd]4%  

bairuizheng 2020-01-19 01:13

悬浮在真空中的哑铃形二氧化硅纳米颗粒，那找个类似结构的气体大分子放进真空，应该更快。

tassy 2020-01-19 03:15

牙医钻头的转速最高可达每分钟50万转

刘明欢聪慧 2020-01-19 03:57

旋转新记录

dushunli 2020-01-19 07:10

旋转速度！

从业者007 2020-01-19 08:04

新设备可以用来测量诸如真空摩擦和纳米级磁性等量子效应。