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Tuesday, June 2, 2020
Quantum jitter lets heat travel across a vacuum

Quantum jitter lets heat travel across a vacuum

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For the first time, scientists have measured the heat transferred by the quantum effervescence of empty space. Two tiny, vibrating membranes reached the same temperature despite being separated by a vacuum, physicists report in the Dec. 12 Nature. The result is the first experimental demonstration of a predicted but elusive type of heat transfer. Normally,…
A new, theoretical type of time crystal could run without outside help

A new, theoretical type of time crystal could run without outside...

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A newly proposed type of time crystal could stand alone. Time crystals are structures that repeat regularly in time, just as a standard crystal is composed of atoms arranged in a regularly repeating pattern in space. Scientists first created time crystals in 2016 (SN: 10/26/16). But those crystals require periodic blasts from a laser to…
Physicists catch very first video footage of quantum knots unraveling in superfluid

Physicists catch very first video footage of quantum knots unraveling in...

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Enlarge / Researchers captured the decay of a quantum knot (left), which untied itself after a few microseconds and eventually turned into a spin vortex (right). Tuomas Ollikainen/Aalto University The same team who tied the first "quantum knots" in a superfluid several years ago have now discovered that the knots decay, or "untie" themselves, fairly…
Google formally claims quantum supremacy

Google formally claims quantum supremacy

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Quantum supremacy is here, researchers from Google claim. For the first time, a quantum computer has solved a problem that can’t be performed by a standard computer — at least not within a reasonable amount of time — Google announced October 23. This milestone, known as quantum supremacy, is a long-anticipated step toward useful quantum…
Sean Carroll’s brand-new book argues quantum physics results in lots of worlds

Sean Carroll’s brand-new book argues quantum physics results in lots of...

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Something Deeply HiddenSean CarrollDutton, $29 Quantum physics is about multiplicity. Its equations describe multiple possible outcomes for a measurement in the subatomic realm. Physicists have devised a dozen or two different interpretations of what that really means. And in turn, dozens and dozens of books have been written to explain, defend or deny the validity…
Reports hint that Google has actually achieved quantum supremacy

Reports hint that Google has actually achieved quantum supremacy

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A leaked paper suggests that Google has achieved a milestone known as quantum supremacy, using a quantum computer to perform a calculation that couldn’t be achieved even with the world’s most powerful supercomputers. It’s a hotly anticipated goal, and one intended to mark the beginning of a new era of quantum computation (SN: 6/29/17). But…

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