Physics Feed - Page 14
18d ago
Physics
Ask Ethan: Is it possible that gravity isn’t quantum?
For generations, physicists have been searching for a quantum theory of gravity. But what if gravity isn't actually quantum at all?
19d ago
Physics
Self-assembled Photonic Cavities with Atomic-Scale Confinement
Researchers have developed a method for self-assembling photonic cavities with atomic-scale confinement, enabling extreme light confinement and opening up new possibilities for nanophotonic devices. The study, conducted by scientists at the Technical University of Denmark, combines surface forces and conventional lithography and etching techniques to create suspended silicon nanostructures with void features well below the diffraction limit. The researchers demonstrated the fabrication of waveguide-coupled high-Q silicon photonic cavities that confine telecom photons to 2 nm air gaps with an aspect ratio of 100, resulting in mode volumes more than 100 times below the diffraction limit. Scanning transmission electron microscopy measurements confirmed the sub-nanometer dimensions of the devices. The use of self-assembly in combination with planar semiconductor technology could lead to the development of a new generation of nanophotonic devices that combine atomic-scale confinement with the scalability of planar semiconductors.
24d ago
Physics
Lost in Space: Is a Giant Void Driving the Universe Apart?
A new theory challenges the standard cosmological model, suggesting that a giant void could explain conflicting expansion rate measurements and potentially require a revision of Einstein's gravitational theory.
24d ago
Physics
Unlocking the Quantum Realm: A New Tool for Uncharted Phenomena
Researchers at the University of Innsbruck and the Institute of Quantum Optics and Quantum Information (IQOQI) have developed a new approach to studying and understanding entanglement in quantum materials. Through advancements in ion trap quantum simulators, they were able to recreate a real material in a controlled laboratory environment and observe effects that were previously only described theoretically. The researchers also discovered that temperature profiles can be used as a shortcut to determine the degree of entanglement in quantum systems. These findings open up new horizons in quantum physics and provide a powerful tool for studying large-scale entanglement in quantum matter.
27d ago
Physics
Shattered Dreams: Scientists Debunk LK-99 Room Temperature Superconductivity Myth
New research has disproved the superconductivity claims of LK-99, showing that its properties result from the structural transition of Cu2S impurities, not superconductivity.
29d ago
Physics
Exotic Liquid-Like Flow of Electricity Detected in Strange Metals
A new discovery in strange metals has found that electricity doesn't always move in step and can bleed in a way that challenges our understanding of particles.
4h ago
Physics
Most powerful cosmic ray in decades has scientists asking, 'What the heck is going on?'
Scientists are seeking answers to a new outer space mystery after a telescope in Utah detected the most powerful cosmic ray seen in more than three decades.
1d ago
Physics
Scientists Stunned by Most Powerful Cosmic Ray in Decades
Scientists are puzzled by the detection of the most powerful cosmic ray seen in over 30 years, leaving them questioning its origin and source.