In new research appearing in Physical Review Letters, an international research team, including UC Davis physicists, has expanded the Fermi-Hubbard model, allowing for a more detailed exploration of materials and their properties. In the study, the researchers measured the equation of state for Ytterbium atoms in an optical lattice. Specifically, they used the fermionic isotope 173Yb, which is a metallic element with atoms that can adopt six possible states.

A study using data from telescopes on Earth and in the sky resolves a problem plaguing astronomers working in the infrared and could help make better observations of the composition of the universe with the James Webb Space Telescope and other instruments. The work is published April 20 in Nature Astronomy. 

Beneath the concrete world discernible to our senses is a world of building blocks. A world of molecules, and beneath that, atoms. The organization of these individual parts dictates the properties of materials. In Professor of Chemistry Davide Donadio's lab, Frank Cerasoli, a postdoctoral researcher, uses computer simulations to model materials at the molecular level, with the hope of discovering new materials that can advance our technologies.