Visit the Nature Publishing Group booth at the American Physical Society meeting in New Orleans, Louisiana. We are exhibiting from 10-12 March 2008, at booth 540. Pop by to pick up your free sample copies of Nature, Nature Materials, Nature Physics, Nature Nanotechnology and Nature Photonics, as well as your copy of Nature Milestones in Spin.

The March 2008 issue of Nature Physics contains a Focus on quantum phase transitions which is free online to 3 April. Phase transitions are familiar occurrences, such as the freezing of water to ice. When the transition occurs at zero temperature, it is known as a ‘quantum phase transition’. As distinct states of matter coexist at a transition, there are quantum fluctuations between them. The Nature Physics Focus explores the resulting – and often surprising – collective behaviour, in an Editorial, two Perspectives and three Reviews.