Ising Model

D-Wave's claim that its quantum computers can solve problems that would take hundreds of years on classical machines have been undermined by two separate research groups showing that even an ordinary laptop can perform similar calculations

A model system created by stacking a pair of monolayer semiconductors is giving physicists a simpler way to study confounding quantum behavior, from heavy fermions to exotic quantum phase transitions.

Indistinguishability of particles is a fundamental principle of quantum mechanics. For all elementary and quasiparticles observed to date - including fermions, bosons, and Abelian anyons - this principle guarantees that the braiding of identical particles leaves the system unchanged. However, in two spatial dimensions, an intriguing possibility exists: braiding of non-Abelian anyons causes rotations in a space of…

An international team of physicists, with the participation of the University of Augsburg, has for the first time confirmed an important theoretical prediction in quantum physics. The calculations for this are so complex that they have hitherto proved too demanding even for supercomputers. However, the researchers succeeded in simplifying them considerably using methods from the field of machine learning. The study…

Researchers from Skoltech, the University of Arizona and Linköping University in Sweden have created a graphical model that describes the patterns of infection outbreaks spreading between different localities. The model helps calculate the probability of a selected group of areas being hit by a local outbreak and map out a minimum set of prevention measures. The paper was published in Scientific Reports.

Compared to supercomputers and quantum computers, LightSolver's all-laser processing unit demonstrated exceptional potential during its initial tests.

Getting something for nothing doesn't work in physics. But it turns out that, by thinking like a strategic gamer, and with some help from a demon, improved energy efficiency for complex systems like data centers might be possible.

Combinatorial optimization problems are at the root of many industrial processes and solving them is key to a more sustainable and efficient future. Ising machines can solve certain combinatorial optimization problems, but their efficiency could be improved with multi-spin flips. Researchers have now tackled this difficult problem by developing a merge algorithm that disguises a multi-spin flip as a simpler,…

A multidisciplinary team at the UNIGE has succeeded in explaining the complex distribution of scales in the ocellated lizard by means of a simple equation. The shape-shifting clouds of starling birds, the organization of neural networks or the structure of an anthill: nature is full of complex sy

The shape-shifting clouds of starling birds, the organization of neural networks or the structure of an anthill: nature is full of complex systems whose behaviors can be modeled using mathematical tools. The same is true for the labyrinthine patterns formed by the green or black scales of the ocellated lizard. A multidisciplinary team from the University of Geneva (UNIGE) explains, thanks to a very simple…

When voters decide between two alternatives, as is effectively the case in the U.S. presidential election, it usually comes down to a neck-and-neck race. Researchers can now explain this mathematically

In a ground-breaking experiment, researchers from the University of Groningen collaborated with their peers from Nijmegen and Twente universities in the Netherlands, and the Harbin Institute of Technology in China. Together, they confirmed the existence of a superconductive state that was first pred

Today's quantum computers, even when imperfect, may become part of scientific research—and perhaps our lives—sooner than expected.

May be a way to squeeze useful work out before we get quantum error correction.

Humanities and Social Sciences Communications - What science can do for democracy: a complexity science approach

Article URL: https://blog.xa0.de/post/List-of-QUBO-formulations/ Comments URL: https://news.ycombinator.com/item?id=30632785 Points: 1 # Comments: 0

A decades-old method called the "bootstrap" is enabling new discoveries about the geometry underlying all quantum theories.

Researchers from the Technion have pushed the limits of the possible in the field of atomic-scale spin-optics, creating a spin-optical laser from monolayer-integrated spin-valley microcavities without requiring magnetic fields or cryogenic temperatures. Scientists at the Technion – Israel Insti

Using IBM's 127-qubit quantum computer to simulate deep quantum circuits using Zero Noise Extrapolation

IBM and UC Berkeley researchers today reported work in which IBM's 127-qubit Eagle QPU, leveraging error mitigation and correction techniques, outperformed a classical computer on a complex simulation problem. Their […]