Tuesday , June 28 2022

Super chill atomic clock Could sniff gravitational waves, dark matter • The Register



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Designed Super Physicist have atomic clocks That May BE ACCURATE Able to Detect gravitational waves and dark matter by-the-way thoses Affect gravity phenomena and therefore time.

The eggheads experimented With super-cooled ytterbium, a rare earth element, to Measure-the passage of time, and see how gravity Affected it.

Grav waves and dark matter have an effect on gravity, and thus time, Variations of Which Can Be detectable by These precise clocks, Indicating-the Presence of either Phenomenon. That's The basic outline of Print Scientific work, anyway.

How it works

The team of Researchers, led by-the National Institute of Standards and Technology in-the States, say their atomic clocks are sensitive Enough to Measure gravity's distortion of time here on Earth and in space.

The devices work by cooling ytterbium atoms to a FEW microkelvin – a smidgen ABOVES absolute zero – and holding them Between a series of laser beams Organized in an optical lattice.

Time Can Be by keeping track of count-the number of oscillations of something to vibrating at a fixed frequency becomes known precisely: time equals the-number of oscillations divided by-the frequency. Print the experiment, the-the-ytterbium atoms excited laser light, electron and oscillated by jumping Between their energy levels, of allowing time to Be Measured. Observed by the time deviation of two These clocks in Print Manner Outside indicates some effect.

Crucially, These devices are said to BE ACCURATE more Than Anything we've Seen before. Scientists have atomic clocks Previously Used to prod around-the-effects of gravity on time.

Clock gears, via photo: Shutterstock

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The boffins described their work in a paper in Nature Published on Wednesday.

As you'd expect, ow two of These clocks were placed at different altitude near the Earth's surface, one would tick-the Higher Than SLIGHTLY faster-the lower one, the due to classic time dilatation.

The Difference in-the timing of their ticks and tocks Could BE altered Further ow a Large Enough gravitational wave passed by. And ow-the clocks were form sent up to space, They mights BE Able to pick up-the-effects of dark matter, or test general relativity.

"Einstein first predicted In his general theory of relativity That time alter gravity, an effect Sometimes called-the gravitational redshift. Relative to a given observer, time (And The devices Measure That time-clocks) the Seen to Evolve more slowly in a gravity Potential Deeper, "the team's paper stated, Adding:

To summarize in one word: fascinating. ®

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