Professor Sir Anthony Leggett, the theoretical physicist who has died aged 87, shared the 2003 Nobel Prize in Physics for his ...

When scientists unwittingly turned helium into a superfluid — a feat many thought was impossible — Dr. Leggett not only recognized what had happened but also explained how.

Physics is often about recognizing patterns, sometimes repeated across vastly different scales. For instance, moons orbit planets in the same way planets orbit stars, which in turn orbit the center of ...

Conventional crystals are materials in which atoms arrange themselves in repeating spatial patterns. Time crystals, on the other hand, are phases of matter characterized by repeating motions over time ...