A dimensionless Hamiltonian of an N-spin Ising model without an external magnetic field (Fig. 1a) is given by Figure 1: Ising model and set-up for generating artificial Ising spins based on DOPOs.

In previous papers (1976), (1977a), (1979) limit theorems were obtained for the classical Ising model, and these provided the basis for asymptotic inference. The present paper extends these results to ...

The central selling point of qubit-based quantum processors is that they can supposedly solve certain types of tasks much faster than a classical computer. This comes however with the major ...

These models differ by the constrains given to the orientation of the electron's spins (arrows). If all spins are aligned in one direction, the material becomes a ferromagnet. Below the magnetic ...

This is the last in a series of three papers on the history of the Lenz-Ising model from 1920 to the early 1970s. In the first paper, I studied the invention of the model in the 1920s, while in the ...

Ising modeller: a D-Wave quantum processor has simulated a 3D magnet. (Courtesy: D-Wave Systems) Researchers in Canada have used a D-Wave quantum processing unit to solve a computationally challenging ...

Subscribe to our newsletter for the latest sci-tech news updates. Theoretical physicists develop mathematical models to describe material systems, which they can then use to make predictions about how ...