或许，除了物理学家，不会有人对定义“一秒钟”如此执着。 2024年9月4日，《自然》杂志刊登了一篇封面论文，标题是《钍−229m 异构体的核跃迁与锶−87原子钟的频率比》。 而在同一天，《科学》杂志官网刊出评论文章，称该成果“有望将超精密核钟带入新时代的突破”。更有网友声称，此成果论文作者，美国科罗拉多大学的叶军团队，有望在未来获得诺贝尔物理学奖。 那么，到底是什么研究能让《自然》《科学》两大顶级 ...

The custom of changing the clocks twice a year has been around in the UK for over a century, taking place once in March and once in October. There’s still a little while until the clocks change ...

The Australian military is getting new quantum atomic clocks under the Aukus Pillar Two pact. Quantum technology is one of eight technologies that the US, Australia and UK are sharing more of under ...

Atomic clocks, which are used to measure standard time and calculate GPS, boast extremely high accuracy, with an error of just one second per several hundred thousand ...

A potential explosion aboard a damaged Malta-flagged cargo ship carrying ammonium nitrate from Russia could cause a blast as powerful as the atomic bomb used by the U.S. in Hiroshima, Japan ...

Scientists use atomic clocks to measure the "second," the smallest standard unit of time, with great precision. These clocks use natural oscillations of electrons in atoms, similar to how ...

3, the first Sunday in November. Clocks will "fall back" one hour at 2 a.m. on Nov. 3, granting most people an extra hour of sleep. With the change comes earlier sunrises and nightfall well before ...

“Can chatbots help you build a bioweapon?” a headline in Foreign Policy asked. “ChatGPT could make bioterrorism horrifyingly easy,” a Vox article warned. “A.I. may save us or construct viruses to kill ...

FOR THE discerning timekeeper, only an atomic clock will do. Whereas the best quartz timepieces will lose a millisecond every six weeks, an atomic clock might not lose a thousandth of one in a decade.

An atomic clock is a highly precise timekeeping device that measures time based on the frequency of electromagnetic radiation emitted or absorbed by atoms as they transition between energy levels.

Such a device would greatly surpass the capabilities of atomic clocks, which define the span of a second through controlled energy jumps in atoms’ electrons and are currently the pinnacle of ...