Lifeboat Foundation

In a certain sense, physics is the study of the universe’s symmetries. Physicists strive to understand how systems and symmetries change under various transformations.

New research from Washington University in St. Louis realizes one of the first parity-time (PT) symmetric quantum systems, allowing scientists to observe how that kind of symmetry—and the act of breaking of it—leads to previously unexplored phenomena. The work from the laboratory of Kater Murch, associate professor of physics in Arts & Sciences, is published Oct. 7 in the journal Nature Physics.

Other experiments have demonstrated PT symmetry in classical systems such as coupled pendulums or optical devices, but this new work in Murch’s lab, along with experiments in China by Yang Wu et al., reported in Science this May, provides the first experimental realization of a PT-symmetric quantum system.

As a student astronomer scanning the skies with homemade instruments a quarter of a century ago, Didier Queloz spent months doubting the data that led him to an inescapable conclusion: he’d just discovered the first planet outside Earth’s solar system.

The Swiss scientist had spent much of his PhD research refining techniques to detect so-called exoplanets, which until one fateful night in October 1995 had previously only existed in the realm of science fiction.

Queloz and his colleague Michel Mayor, who on Tuesday were awarded the Nobel Prize for Physics for their pioneering work, had already overcome a number of obstacles in their galaxy-wide search.

Methane bomb is ticking.

Researchers were able to see the greenhouse gas bubbling through the seawater.

Walmart has over 100,000 different machine learning or AI-based projects currently in production. The success rate, however, is still just 75 percent.

With a self-guiding drone hovering over your shoulder, a not-too-humanoid robot sidekick as your wingman, and a four-legged fetch ‘bot trotting along beside, the day when you can surround yourself with a whole gaggle of AI-powered helpers is already here … even if it’s still the wee hours of the early morning.

Whether by air, on wheels, or even on padded little robot paws, the technology that drives our mechanized helpers is reaching that autonomous point at which the droids are able to think for themselves as they carry out their limited missions. Sure, they’re not quite ready to cross platforms and begin communicating with one another just yet, but at least they all can communicate with you — which pretty much makes you the star character in your budding little electronic entourage.

Dive into the subatomic world, into the heart of protons or neutrons, and you’ll find elementary particles known as quarks. Measuring the mass of these quarks can be challenging, but new results from the CMS collaboration reveal for the first time how the mass of the top quark – the heaviest of six types of quarks – varies depending on the energy scale used to measure the particle.

The theory of quantum chromodynamics, a component of the Standard Model, predicts this energy-scale variation, known as running, for the masses of all quarks and for the strong force acting between them. Observing the running masses of quarks can therefore provide a way of testing quantum chromodynamics and the Standard Model.

Experiments at CERN and other laboratories have already measured the running masses of the bottom and charm quarks, the second and third heaviest quarks, and the results were in agreement with quantum chromodynamics. Now, the CMS collaboration has used data from high-energy proton–proton collisions at the Large Hadron Collider to chase out the running mass of the top quark.

In a new paper, Facebook researchers propose an AI technique that uses schemas to teach robots to manipulate objects in less than 10 hours of training.

The new study demonstrates a bizarre quantum effect at never-before-seen scales.

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