Physics

Superfluid Motion of Light Observed at Room Temperature

An international team of physicists has experimentally demonstrated that superfluid motion of light is possible under ambient conditions. Until now, this phenomenon had only been observed at low cryogenic temperatures. Schematic of the organic microcavity used to observe superfluid flow. Image credit: Polytechnique Montreal. The wave nature of light has …

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Scientists Detect Gravitational Waves for Third Time

Scientists from the LIGO Scientific Collaboration and the Virgo Collaboration have made a third detection of gravitational waves, ripples in the fabric of space and time, first predicted by Albert Einstein more than a century ago. The research is published in the journal Physical Review Letters. Artist’s conception shows two …

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Researchers Create Molecular Version of Black Hole

When a team of physicists focused the full intensity of SLAC’s Linac Coherent Light Source (LCLS) Coherent X-ray Imaging instrument — the world’s most powerful X-ray laser with an intensity of 100 quadrillion kilowatts per sq.cm — on a small molecule, they got a surprise: a short laser pulse stripped …

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Physicists Experimentally Observe Decay of Quantum Monopole

An international team of physicists from Finland and the United States has made the first experimental observations of the dynamics of isolated monopoles in quantum matter. The results are published in the journal Physical Review X. This is an artistic view of the decay of a quantum-mechanical monopole into a …

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Space-Time is Constantly Moving, Physicists Say

A team of researchers from the Department of Physics and Astronomy at the University of British Columbia, Canada, has tackled the question ‘what causes the slow accelerating expansion of the Universe’ in a study that tries to resolve a major incompatibility issue between two theories: quantum mechanics and Einstein’s theory …

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Physicists Directly Observe Hydrogen Bonds in Single Molecule

For the first time, physicists have succeeded in observing and studying in detail the hydrogen bonds in a single molecule. Quantitative measurements of the C═O***H–C bond: (A) schematic drawing of the hydrogen bonding measurement on trifluorantheno[3.3.3]propellane with a CO-functionalized tip; right shows the AFM image. Scale bar – 300 pm; …

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Largest X-Ray Laser Ever Is About to Power Up

Particle accelerators can fire all kinds of particles, from protons to electrons and even whole atomic nuclei — and now an enormous linear photon accelerator is about to join the mix. Deutsches Elektronen-Synchrotron (DESY) has been working for years toward this single monumental achievement: It’s about to fire up the world’s …

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Researchers Invent Nanoscale ‘Refrigerator’ for Quantum Computers

A team of researchers from the Department of Applied Physics at Aalto University in Finland has invented a quantum-circuit refrigerator, which can reduce errors in quantum computing. Photo of the centimeter-sized silicon chip, which has two parallel superconducting oscillators and the quantum-circuit refrigerators connected to them. Image credit: Kuan Yen …

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