Physics

Ripples in Space-Time Could Actually Reveal When Time Began : ScienceAlert

The propagation of gravitational waves through matter could reveal the ripples in space-time generated by the Big Bang. Two plasma physicists used the propagation of electromagnetic waves through plasma as an analogue for gravitational waves, devising a set of equations that describe what to look for as gravitational waves travel through stars and gas in …

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The team uses quantum sensors to reveal how Weyl photocurrents flow

A team of Boston College researchers discovered that the photocurrent flows in (illustrated in blue) along one crystal axis of the Weyl semimetal and flows out (illustrated in yellow/orange) along the perpendicular axis, represented here as a result of a new technique the team developed using quantum magnetic field sensors to visualize the flow of …

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Astronomers discover a peculiar cataclysmic variable star

Top: Long-term ATLAS light curve of J1344, consisting of c- and o-band observations. The shaded region indicates the time of the TESS observations. Middle: TESS light curve of J1344. Bottom: Power spectrum of the TESS light curve. Credit: Littlefield et al, 2023 Using NASA’s Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered a peculiar cataclysmic …

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Quantum physicists determine how to control two quantum light sources rather than one

Illustration of two a chip comprising two entangled quantum light sources. Credit: Peter Lodahl In a new breakthrough, researchers at the University of Copenhagen, in collaboration with Ruhr University Bochum, have solved a problem that has caused quantum researchers headaches for years. The researchers can now control two quantum light sources rather than one. Trivial …

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Solar system formed from ‘poorly mixed cake batter,’ isotope research shows

A meteorite thin section under a microscope. Different colors represent different minerals, because light travels through them in different ways. The round mineral aggregates are chondrules, which are a major component in primitive meteorites. Credit: Nicole Xike Nie. Earth’s potassium arrived by meteoritic delivery service finds new research led by Carnegie’s Nicole Nie and Da …

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Astronomers inspect a powerful radio-loud high-redshift quasar

Naturally weighted 22-GHz EVN image of J2102+6015. The brighter eastern and the fainter western features are labeled as E and W, respectively. Credit: Frey et al, 2023 Using the European VLBI Network (EVN), an international team of astronomers has performed high-resolution imaging observations of a powerful and radio-loud high-redshift quasar known as J2102+6015. Results of …

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