Berkeley Lab scientists have demonstrated how floating particles will assemble and synchronize in response to acoustic waves. Their simple experiment provides a new framework for studying how seemingly lifelike behaviors emerge in response to external forces. The work could help address fundamental questions about energy dissipation and non-equilibrium thermodynamics.
A team of Chinese scientists has realized the satellite-based distribution of entangled photon pairs over 1,200 km. The photon pairs were demonstrated to be still entangled after traveling long distances and Bell's inequality was shown to be violated under strict Einstein locality conditions.
The classic method for studying how electrons interact with matter is by analyzing their scattering through thin layers of a known substance. This happens by directing a stream of electrons at the layer and analyzing the subsequent deviations in the electrons' trajectories. But researchers in Switzerland have devised a way to examine the movement of low-energy electrons that can adversely impact electronic systems and biological tissue, discussed in this week's The Journal of Chemical Physics.
Researchers from North Carolina State University and the Ruhr-Universität Bochum have developed numerical 'tweezers' that can pin a nucleus in place, enabling them to study how interactions between protons and neutrons produce forces between nuclei.
A UCSB physicist and colleagues review three experiments that hint at a phenomenon beyond the Standard Model of particle physics.
In the first moments after the Big Bang, the Universe was able to expand even billions of billions of billions of times faster than today. Such rapid expansion should be due to a primordial force field, acting with a new particle: inflaton. From the latest analysis of the decay of mesons, carried out in the LHCb experiment by physicists from Cracow and Zurich, it appears, however, that the most probable light inflaton almost certainly does not exist.
While skimmers have been a necessary component in atomic and molecular-beam experiments for decades, they were also known to impose a fundamental limit on the number of particles one could pack into the beam. However, professor Edvardas Narevicius and his team in the Weizmann Institute of Science's Chemical Physics Department have now revealed a simple way to overcome this limit.
Researchers have developed a capacitor with a metal-insulator-semiconductor diode structure that is tunable by illumination. The capacitor, which features embedded metal nanoparticles, is similar to a metal-insulator-metal diode, except the capacitance of the new device depends on illumination and exhibits a strong frequency dispersion, allowing for a high degree of tunability. This capacitor may enhance wireless capability for information processing, sensing and telecommunications. The researchers report their findings in this week's Journal of Applied Physics.
On May 31, the 50-foot-wide superconducting electromagnet at the center of the Muon g-2 experiment at Fermilab saw its first beam of muon particles from Fermilab's accelerators, kicking off a three-year effort to measure just what happens to those particles when placed in a stunningly precise magnetic field. The answer could rewrite scientists' picture of the universe and how it works.
The study demonstrates for the first time a new type of magnetocapacitance, a phenomenon that could be useful in the next generation of 'spintronic' devices.