Browse Physics

Liquids that approach an often-quoted lower limit for viscosity are deemed “perfect,” but now this lower limit is itself being questioned.

Theorists created a gravitational model that is mathematically analogous to one for a standard superconducting device, extending the ways that the tools of general relativity can lead to insights into condensed matter physics.

Although theoretical approaches to modeling “strange metals,” such as the cuprate superconductors, originate from apparently different sources, research now suggests they flow toward a single universal model.

How do gravitational singularities avoid being trapped by event horizons?

A mathematical formulism makes a step forward in proving the AdS/CFT correspondence that connects quantum mechanics with gravity.

In particle physics theory, the presence of multiple metastable vacua gives rise to new possibilities for transitions between energy states.

Results from string theory, generalizing the anti-de Sitter/conformal field theory correspondence, may offer a fresh set of mathematical tools for understanding some kinds of phase transitions that occur in cold atomic systems.

Rotating, donut-shaped black holes may exist if our universe contains extra dimensions.

High energy cosmic rays might produce tiny black holes that could be detected in the next several years.

Extra spatial dimensions–beyond the three we know–could alter Newton’s inverse-square law of gravity at short distances. But new measurements show that Newton is correct down to at least 200 micrometers.

Extra spatial dimensions–beyond the three we know–might exist, while being invisible to most experiments.