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“#Probing the properties of a 2-D fermi gas” Sound propagating in a two-dimensional Fermi gas. The image shows the density of the gas in time, shortly after a sound wave has been excited. Dark red values correspond to a high density, lighter values to a low density. One can see a wave traveling up and…
“#New breakthrough in ‘spintronics’ could boost high speed data technology” In spin pumping experiments, there are four possible mechanisms for transporting a spin current through an antiferromagnet layer (blue) that is sandwiched between two ferromagnets (purple and orange). (Top to bottom) The spin current could be transported by coherent THz spin waves, by evanescent GHz…
“#Theorists calculate upper limit for possible quantization of time” Credit: Pixabay/CC0 Public Domain A trio of theoretical physicists at the Pennsylvania State University has calculated the upper limit for the possible quantization of time—they suggest 10−33 seconds as the upper limit for the period of a universal oscillator. In their paper published in the journal…
“#ATLAS experiment finds evidence of spectacular four-top quark production” Figure 1: Event display of a candidate four-top-quark event, where two of the top quarks decay leptonically (one with a resulting muon (red) and one with an electron (green)), and two top quarks decay hadronically (green and yellow rectangles). The jets (b-tagged jets) are shown as…
“#A Metal-like quantum gas: A pathbreaking platform for quantum simulation” Fig. 1. Schematic of the metal-like quantum gas. Credit: NINS/IMS Electronic properties of condensed matter are often determined by an intricate competition between kinetic energy that aims to overlap and delocalize electronic wave functions across the crystal lattice, and localizing electron-electron interactions. In contrast, the…
“#Experimentally identifying effective theories in many-body systems” Experimental setup at the Kirchhoff Institute for Physics at Heidelberg University. Credit: Alexis Bonnin One goal of science is to find physical descriptions of nature by studying how basic system components interact with one another. For complex many-body systems, effective theories are frequently used to this end. They…
“#Measuring a tiny quasiparticle is a major step forward for semiconductor technology” PL spectra of BN encapsulated monolayer WSe2 at 4.2 K. Credit: Nature Communications (2020). DOI: 10.1038/s41467-020-16934-x A team of researchers led by Sufei Shi, an assistant professor of chemical and biological engineering at Rensselaer Polytechnic Institute, has uncovered new information about the mass of…
“#A quantum memory that operates at telecom wavelengths” Scanning electron micrograph of the opto-mechanical device used as a quantum memory. Credit: Gröblacher Lab, TU Delft. To create large quantum networks, researchers will first need to develop efficient quantum repeaters. A key component of these repeaters are quantum memories, which are the quantum-mechanical equivalents of more…
“#Quantum ‘fifth state of matter’ observed in space for first time” A team of NASA scientists unveiled the first results from Bose-Einstein condensates experiments aboard the International Space Station, where particles can be manipulated free from the constraints of gravity Scientists have observed the fifth state of matter in space for the first time, offering…