Struggle to wrap your head around daylight savings? Spare a thought for the world's timekeepers, who are trying to work out how climate change is affecting Earth's rotation—and in turn, how we keep track of time.
In a new Nature study, Columbia Engineering researchers have built a photonic chip that is able to produce high-quality, ultra-low-noise microwave signals using only a single laser. The compact device—a chip so small, it ...
Quantum sensor technology promises even more precise measurements of physical quantities. A team led by Christian Roos at the University of Innsbruck has now compared the signals of up to 91 quantum sensors with one another ...
Dark matter comprises more than 80% of all matter in the cosmos but is invisible to conventional observation, because it seemingly does not interact with light or electromagnetic fields. Now Dr. Sukanya Chakrabarti, the Pei-Ling ...
While atomic clocks are already the most precise timekeeping devices in the universe, physicists are working hard to improve their accuracy even further. One way is by leveraging spin-squeezed states in clock atoms.
Atomic clocks are a class of clocks that leverage resonance frequencies of atoms to keep time with high precision. While these clocks have become increasingly advanced and accurate over the years, existing versions might ...
The Atacama Large Millimeter/submillimeter Array (ALMA) has just received a "heart transplant," high in the Atacama Desert in Northern Chile. ALMA, the most complex astronomical observatory ever built on Earth, installed ...
Once every year, a select group of nuclear, climate and technology experts assemble to determine where to place the hands of the Doomsday Clock.
In a new study published in Science today, JILA and NIST (National Institute of Standards and Technology) Fellow Jun Ye and his research team have taken a significant step in understanding the intricate and collective light-atom ...
In physics, scientists have been fascinated by the mysterious behavior of superconductors—materials that can conduct electricity with zero resistance when cooled to extremely low temperatures. Within these superconducting ...
