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麻省理工学院暑研(麻省理工学院最新研究表明)

麻省理工学院暑研(麻省理工学院最新研究表明)原文MIT是采用这种方法的最先进的原子钟,它们从宇宙诞生(大约140亿年前)就存在了,研究人员相信,它们的精确度将不到十分之一秒。在同样的时间框架内,最先进的原子钟与目前的设置会偏差大约半秒。更新(12月18日):这篇文章的一个早期版本说,研究人员基于这种技术构建了一个原子钟。据该团队称,他们的目标是建立一个这样的时钟,但到目前为止,“我们所做的是证明量子纠缠可以帮助建立最精确的时钟。”引力波,研究,原子钟,量子纠缠,暗物质,原子钟,纠缠原子

麻省理工学院的研究人员表示,量子纠缠可以使原子钟更精确,它可以帮助科学家探索诸如重力对时间的影响等问题。

麻省理工学院的研究人员设计了一种方法,他们说这种方法可以帮助建造迄今为止最精确的原子钟。他们的方法可以帮助科学家探索诸如引力对时间流逝的影响以及时间是否会随着宇宙变老而改变等问题。更精确的原子钟甚至可以灵敏到探测暗物质和引力波。

研究人员在《自然》杂志上发表了他们的发现,他们使用了一种不同于现有原子钟的方法来实现更高的精度。它们的设计中心是量子纠缠原子,而不是测量随机振荡的原子。原子以一种“根据经典物理定律是不可能的”的方式相互关联。

该团队将350个镱原子纠缠在一起。稀土元素的原子振荡频率与可见光相同,比其他原子钟所用的元素铯每秒的频率高出10万倍。麻省理工学院指出,如果科学家能够精确追踪这些振荡,他们“就可以利用原子来区分更小的时间间隔”。

是采用这种方法的最先进的原子钟,它们从宇宙诞生(大约140亿年前)就存在了,研究人员相信,它们的精确度将不到十分之一秒。在同样的时间框架内,最先进的原子钟与目前的设置会偏差大约半秒。

更新(12月18日):这篇文章的一个早期版本说,研究人员基于这种技术构建了一个原子钟。据该团队称,他们的目标是建立一个这样的时钟,但到目前为止,“我们所做的是证明量子纠缠可以帮助建立最精确的时钟。”

引力波,研究,原子钟,量子纠缠,暗物质,原子钟,纠缠原子

麻省理工学院暑研(麻省理工学院最新研究表明)(1)

MIT

原文

MIT researchers show quantum entanglement could make atomic clocks more accurate

It could help scientists explore issues such as the effect of gravity on time.

MIT researchers have designed a method that they say could help build the most precise atomic clock to date. Their approach could help scientists explore questions such as the effect of gravity on the passage of time and whether time changes as the universe gets older. More accurate atomic clocks would even be sensitive enough to detect dark matter and gravitational waves.

The researchers who published their findings in a paper in Nature used a different method from existing atomic clocks to achieve greater accuracy. Instead of measuring randomly oscillating atoms their design centers around quantumly entangled atoms. The atoms are correlated in a way that's "impossible according to the laws of classical physics."

The team entangled around 350 atoms of ytterbium. The rare earth element's atoms oscillate at the same frequency as visible light or 100 000 times more often per second than cesium the element used in other atomic clocks. If scientists can track those oscillations precisely they "can use the atoms to distinguish ever smaller intervals of time " MIT notes.

Were the most advanced atomic clocks adapted to use this method and they'd been around since the beginning of the universe (some 14 billion years ago) researchers believe they'd be accurate to within less than a tenth of a second. The most advanced atomic clocks would be off by around half a second over the same timeframe with their current setups.

Update (12/18): An earlier version of this article said researchers built an atomic clock based on this technique. According to the team their goal is to build one however so far “what we have done is a demonstration that quantum entanglement could help build the most precise clock.”

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