Physics

Physicists Say Quantum Gravity ‘Has No Symmetry’

An international team of theoretical physicists has found that when gravity is combined with quantum mechanics, no global symmetries are possible. Quantum gravity is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics. Image credit: Gerd Altmann. “There are four kinds of …

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Physicists Developing Superconducting Quantum Refrigerator

A research team led by University of Rochester physicists has conceived an idea for a superconducting quantum refrigerator, which would cool atoms to nearly absolute zero temperatures. The superconducting quantum refrigerator is similar to a conventional refrigerator, in that it moves a material between hot and cold reservoirs. However, instead …

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Researchers Generate Electricity from Americium

Researchers in the United Kingdom have extracted americium from a plutonium stockpile and used the heat generated from this radioactive element to generate enough electric current to light up a small lightbulb. The breakthrough means potential use of americium in radioisotope power systems for missions which would use the heat …

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Gravitational Waves Leave Observable Aftereffects in Universe

Gravitational waves are ‘ripples’ in space-time caused by some of the most violent and energetic processes in the Universe. Albert Einstein predicted the existence of gravitational waves in 1916 in his general theory of relativity. New research shows those waves leave behind plenty of ‘memories’ that could help detect them …

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LIGO and Virgo Observatories Detect Two New Gravitational Waves

On April 25 and 26, 2019, NSF’s Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European-based Virgo detector registered two new gravitational waves, the ripples in space-time predicted by Albert Einstein. The first was from a neutron star crashing into another neutron star 500 million light-years away, and the second was …

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