‘Could the theory be wrong? Possibly. That is the point and the case for all theories,’ says Cronin. ‘But perhaps it is less wrong than our current understanding and it will help us understand the link between physics and biology through chemistry. We have to try and we think we are onto something.’
A Sharma et al, Nature., 2023, DOI: 10.1038/s41586-023–06600-9.
Scientists have observed the molecular motion of rubber components typically used in automobile tires—polybutadiene and carbon black—with the world’s fastest time resolution.
The study, published in Applied Physics Letters, reveals a clear interaction between the two components on the atomic scale, paving the way towards improved diagnostics of tire rubber degradation and the development of materials with enhanced durability.
Tire rubber is a composite material that typically includes synthetic rubber, such as polybutadiene, and added nanoparticles, such as carbon black, to improve its physical properties. During driving, strong forces act on the tire, causing its components to move against each another, which can lead to wear and degradation of the material.
An international team of scientists, including from the University of Cambridge, have launched a new research collaboration that will leverage the same technology behind ChatGPT to build an AI-powered tool for scientific discovery.
While ChatGPT deals in words and sentences, the team’s AI will learn from numerical data and physics simulations from across scientific fields to aid scientists in modeling everything from supergiant stars to the Earth’s climate.
The team launched the initiative, called Polymathic AI earlier this week, alongside the publication of a series of related papers on the arXiv open access repository.
A new study reports conclusive evidence for the breakdown of standard gravity in the low acceleration limit from a verifiable analysis of the orbital motions of long-period, widely separated, binary stars, usually referred to as wide binaries in astronomy and astrophysics.
The study carried out by Kyu-Hyun Chae, professor of physics and astronomy at Sejong University in Seoul, used up to 26,500 wide binaries within 650 light years (LY) observed by European Space Agency’s Gaia space telescope. The study was published in the 1 August 2023 issue of the Astrophysical Journal.
For a key improvement over other studies Chae’s study focused on calculating gravitational accelerations experienced by binary stars as a function of their separation or, equivalently the orbital period, by a Monte Carlo deprojection of observed sky-projected motions to the three-dimensional space.
Dark energy, one of the most controversial physics ideas, is getting another challenge. After all, if this force is supposed to make up about 68% of the mass-energy of the universe, where exactly is it? A new paper by a pair of Russian astrophysicists says dark energy simply doesn’t exist. Instead, they point to the mysterious Casimir effect as the explanation for the accelerating expansion of the universe.
The study, from Professor Artyom Astashenok and undergraduate student Alexander Teplyakov of the Immanuel Kant Baltic Federal University, takes issue with the fact that as far as dark energy’s suggested role, “no one knows what is it and how it works,” as remarks Astashenok in a press release.
Physicists have shown that simulating models of hypothetical time travel can solve experimental problems that appear impossible to solve using standard physics.
Some asteroids are dense. So dense in fact, that they may contain heavy elements outside of the periodic table, according to a new study on mass density.
The team of physicists from The University of Arizona say they were motivated by the possibility of Compact Ultradense Objects (CUDOs) with a mass density greater than Osmium, the densest naturally occurring, stable element, with its 76 protons.
“In particular, some observed asteroids surpass this mass density threshold. Especially noteworthy is the asteroid 33 Polyhymnia,” the team writes in their study, adding that “since the mass density of asteroid 33 Polyhymnia is far greater than the maximum mass density of familiar atomic matter, it can be classified as a CUDO with an unknown composition.”
Inga-Av / iStock.
Now, Dr. Melvin Vopson, a physicist, is following up on such a theory and investigating a new law of physics to support the idea that our reality might be a computer simulation, according to a statement by the University of Portsmouth.
The concept that we are all computer-generated characters occupying a world as real as the ones gamers explore on their PlayStation consoles isn’t exactly a new one.
As far back as 1999, Morpheus was entering “The Matrix” to break Neo and a few other chosen few out of a simulated reality created by advanced machines in order to use humans as an energy source. But as the idea permeates not just the realm of science fiction and popular culture, but academia as well, every now and then a philosopher or physicist has something new to say about it.
That’s what happened this week when a physicist at the University of Portsmouth in the United Kingdom proposed that a new law of physics could support the theory that what we see as our reality is in fact a complex virtual simulation running on a cosmic computer. The theory stems from previous research that Dr. Melvin Vopson has conducted looking into whether information has mass.
The scent of coffee. The clarity of sunlight dappling through the trees. The howl of the wind in the dark of night.
All this, according to a philosophical argument published in 2003, could be no more real than pixels on a screen. It’s called the simulation hypothesis, and it proposes that if humanity lives to see a day it can repeatedly simulate the Universe using come kind of computer, chances are we are living in one of those many simulations.
If so, everything we experience is a model of something else, removed from some kind of reality.