Search results for atomic clock

Optics & Photonics Mar 26, 2026

Experimental evidence shows how photons spread across multiple paths in an interferometer

The nature of quantum particles has long puzzled scientists. While single-particle interference suggests that a photon can behave like a spread-out wave, a whole photon is only ever detected in one specific place. Traditional ...

Optics & Photonics Mar 20, 2026

A new entanglement-enhanced quantum sensing scheme

Over the past decades, quantum scientists have introduced various technologies that operate leveraging quantum mechanical effects, including quantum sensors, computers and memory devices. Most of these technologies leverage ...

Astronomy Mar 19, 2026

Gravitational waves leave imprints on light emitted by atoms, theoretical study predicts

Gravitational waves are ripples in spacetime produced by violent cosmic events, such as the merging of black holes. So far, direct detections have relied on measuring tiny distance changes over kilometer-scale instruments. ...

Nanophysics Mar 11, 2026

Compact vacuum ultraviolet laser may improve nanotechnology and power nuclear clocks

Physicists at the University of Colorado Boulder have demonstrated a new kind of vacuum ultraviolet laser that is 100 to 1,000 times more efficient than existing technologies of its kind. The researchers say the device could ...

Quantum Physics Mar 9, 2026

Strontium optical clock accurate to within 1 second over 30 billion years

Researchers from the University of Science and Technology of China have achieved a major breakthrough in optical clock technology, developing a strontium optical lattice clock with stability and uncertainty both surpassing ...

Social Sciences Mar 8, 2026

Why the Doomsday Clock has outlived its usefulness

The Doomsday Clock—a symbolic device to signal an array of existential threats to the world since 1947—was recently moved to 85 seconds before midnight, the closest it has ever been to midnight. And that was before all-out ...

Optics & Photonics Mar 6, 2026

A superradiant clock phase emerges when Rydberg atoms meet quantum light, simulations suggest

Rydberg atoms are atoms with one or more outer electrons excited to very high energy levels, which interact very strongly with each other. These atoms are widely used to run quantum simulations and develop quantum technologies, ...

Nanophysics Mar 2, 2026

Physicists discover long-predicted 'clock magnetism' in an atomically thin crystal

Strange things happen to materials when you peel them down, layer by layer, from thick chunks all the way to sheets just an atom thick. Reporting in the journal Nature Materials, a team led by physicists at The University ...

Astronomy Mar 1, 2026

A 'Cosmic Positioning System' in the outer solar system

There have been plenty of attempts to resolve the "Hubble Tension" in cosmology. This feature describes how one of the most important variables in cosmology, the expansion of the universe, takes on different values depending ...

Optics & Photonics Feb 19, 2026

New chip-scale microcomb uses lithium niobate to generate evenly spaced light

Applied physicists in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have discovered a new way to generate ultra-precise, evenly spaced "combs" of laser light on a photonic chip, a breakthrough ...

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