Phys. Rev. Focus28, 4 (2011) – Published July 22, 2011
In the Aharonov-Bohm effect, proposed in 1959, quantum particles are affected in measurable ways by the classical electromagnetic potential, previously regarded as a purely mathematical construct. The electromagnetic field is too far from the particles to have any direct influence.
Phys. Rev. Focus28, 3 (2011) – Published July 18, 2011
The structures within a pile of soil or grain that allows it to bear weight depend only on the average number of neighbors for each particle, not on any details of the types of particles or even on the presence of gravity.
Phys. Rev. Focus28, 2 (2011) – Published July 8, 2011
Creating a temperature difference in an arrangement of semiconductors generates a circulating current and a magnetic field, according to simulations. The effect may account for some inefficiency in electronic devices.
Phys. Rev. Focus27, 24 (2011) – Published June 17, 2011
The stiffness of a single gold atom–measured as a material property–is at least twice that of a macroscopic chunk of gold, according to measurements of a sharp gold point pressed against a gold surface.
Phys. Rev. Focus27, 22 (2011) – Published June 3, 2011
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.
Phys. Rev. Focus27, 21 (2011) – Published May 27, 2011
Complex structures appear spontaneously in a plasma in a strong magnetic field. The work explores a new regime of plasma behavior that could be relevant for industry and demonstrates a new technique for imaging plasma dynamics.
Phys. Rev. Focus27, 17 (2011) – Published April 29, 2011
Liquid sodium agitated gently in a rotating tank can significantly amplify a magnetic field. The experiment is the first step toward demonstrating a self-sustaining field in a low-turbulence fluid, which may be analogous to Earth’s core.