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During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String theory has not, however, fulfilled expectations. That is why we are of the view that the scientific community needs to reconsider what comprises elementary forces and particles.

Since the early days of general relativity, leading physicists, like Albert Einstein and Erwin Schrödinger, have tried to unify the theory of gravitation and electromagnetism. Many attempts were made during the 20th century, including by Hermann Weyl.

Finally, it seems that we have found a unified framework to accommodate the theory of electricity and magnetism within a purely geometric theory. This means that electromagnetic and are both manifestations of ripples and curvatures in .

Quantum computers, which process information leveraging quantum mechanical effects, have the potential to outperform classical computers in some optimization and computational tasks. In addition, they could be used to simulate complex quantum systems that cannot be simulated using classical computers.

Researchers at Quantinuum and other institutes in Europe and the United States recently set out to simulate the digitized dynamics of the quantum Ising model, a framework that describes in materials, using an advanced quantum computer.

Their simulations, outlined in a paper on the arXiv preprint server, led to the observation of a transient state known as Floquet prethermalization, in which systems appear locally stable before approaching full equilibrium, in regimes that are inaccessible to classical computers.

Using artificial intelligence shortens the time to identify complex quantum phases in materials from months to minutes, finds a new study published in Newton. The breakthrough could significantly speed up research into quantum materials, particularly low-dimensional superconductors.

The study was led by theorists at Emory University and experimentalists at Yale University. Senior authors include Fang Liu and Yao Wang, assistant professors in Emory’s Department of Chemistry, and Yu He, assistant professor in Yale’s Department of Applied Physics.

The team applied to detect clear spectral signals that indicate in quantum materials—systems where electrons are strongly entangled. These materials are notoriously difficult to model with traditional physics because of their unpredictable fluctuations.

In the Quantum Mixtures Lab of the National Institute of Optics (Cnr-Ino), a team of researchers from Cnr, the University of Florence and the European Laboratory for Non-linear Spectroscopy (LENS) observed the phenomenon of capillary instability in an unconventional liquid: an ultradilute quantum gas. This result has important implications for the understanding and manipulation of new forms of matter.

The research, published in Physical Review Letters, also involved researchers from the Universities of Bologna, Padua, and the Basque Country (UPV/EHU).

In physics, it is known that the surface tension of a liquid, caused by intermolecular cohesive forces, tends to minimize the surface area. This mechanism is responsible for macroscopic phenomena such as the formation of raindrops or soap bubbles.

A new study shows that electron spins—tiny magnetic properties of atoms that can store information—can be protected from decohering (losing their quantum state) much more effectively than previously thought, simply by applying low magnetic fields.

Normally, these spins quickly lose coherence when they interact with other particles or absorb certain types of light, which limits their usefulness in technologies like or atomic clocks. But the researchers discovered that even interactions that directly relax or disrupt the spin can be significantly suppressed using weak magnetic fields.

This finding expands our understanding of how to control and opens new possibilities for developing more stable and precise quantum devices.

In a groundbreaking experiment, physicists observed a classic liquid phenomenon—capillary instability—in a quantum gas for the first time. By cooling a mix of potassium and rubidium atoms near absolute zero, researchers created tiny self-bound droplets that behave like liquid despite remaining in

In a new experiment, physicists have replicated the famous Schrödinger’s cat experiment at hotter temperatures than ever before. The breakthrough is a small but significant step toward quantum computers that can work at normal temperatures.

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VIDEO NOTES

Brian Greene is a professor of physics and mathematics at Columbia University, director of its centre for theoretical physics, and the chairman of the World Science Festival. He is best known for his work on string theory, especially in his book “The Elegant Universe”, which turns 25 this year.

LINKS.

Parul Sehgal of The New York Times stated “In these pieces, plucked from the last 20 years, Holt takes on infinity and the infinitesimal, the illusion of time, the birth of eugenics, the so-called new atheism, smartphones and distraction. It is an elegant history of recent ideas. There are a few historical correctives — he dismantles the notion that Ada Lovelace, the daughter of Lord Byron, was the first computer programmer. But he generally prefers to perch in the middle of a muddle — say, the string theory wars — and hear evidence from both sides without rushing to adjudication. The essays orbit around three chief concerns: How do we conceive of the world (metaphysics), how do we know what we know (epistemology) and how do we conduct ourselves (ethics)”. [ 6 ]

Steven Poole of The Wall Street Journal commented “…this collection of previously published essays by Jim Holt, who is one of the very best modern science writers”. [ 7 ]

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