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“#Reviewing the quantum anomalous Hall effect” Credit: FLEET A collaboration across three FLEET nodes has reviewed the fundamental theories underpinning the quantum anomalous Hall effect (QAHE). QAHE is one of the most fascinating and important recent discoveries in condensed-matter physics. It is key to the function of emerging quantum materials, which offer potential for ultra-low…
“#Quirky response to magnetism presents quantum physics mystery” Schematic diagram showing both the magnetism and the conductive behavior on the surface of MnBi2Te4. The magnetism points uniformly upward, as shown by the red arrows, and the surface electrons, represented by the hourglass structures, are conductive because the top and bottom halves touch at the vertex…
“#Phasing quantum annealers into experiments from nonequilibrium physics” The degree of agreement with the experimental data from the D-Wave annealing devices is found to be better for the KZM, a quantum theory, than for the classical spin-vector Monte Carlo model, thus favoring a quantum description of the device. Our work provides an experimental test of…
“#New machine learning-assisted method rapidly classifies quantum sources” Purdue University researchers trained a machine to recognize promising patterns in single-photon emission within a split second. Credit: Purdue University /Simeon Bogdanov For quantum optical technologies to become more practical, there is a need for large-scale integration of quantum photonic circuits on chips. This integration calls for…
“#Spectral classification of excitons” Credit: Ludwig Maximilian University of Munich Ultrathin layers of tungsten diselenide have potential applications in opto-electronics and quantum technologies. LMU researchers have now explored how this material interacts with light in the presence of strong magnetic fields. Owing to their astonishing and versatile properties, atomically thin monolayer and bilayer forms of…
“#Physicists use classical concepts to decipher strange quantum behaviors in an ultracold gas” Credit: CC0 Public Domain There they were, in all their weird quantum glory: ultracold lithium atoms in the optical trap operated by UC Santa Barbara undergraduate student Alec Cao and his colleagues in David Weld’s atomic physics group. Held by lasers in…
“#Technique prevents errors in quantum computers” The research group developed and implemented a new protocol that allows for the protection and the correction of the fragile quantum information in case of errors due to qubit loss. Credit: Harald Ritsch / IQOQI Even quantum computers make mistakes. Their computing ability is extraordinary, exceeding that of classical…
“#Quantum light squeezes the noise out of microscopy signals” ORNL researchers developed a quantum, or squeezed, light approach for atomic force microscopy that enables measurement of signals otherwise buried by noise. Credit: Raphael Pooser, ORNL, U.S. Dept. of Energy Researchers at the Department of Energy’s Oak Ridge National Laboratory used quantum optics to advance state-of-the-art…
“#Predictions of magnetic field response in 2-D valleytronics materials” The figure shows the crystal structure of a 2D transition metal dichalcogenide (bottom) with the inequivalent valleys (K and K’) representing the different momenta of electrons in the material (top). In the presence of a magnetic field (denoted by B), the energies of electronic states at…
“#Study identifies limits on the efficiency of techniques for reducing noise in quantum resources” A drawing representing distillation—a fundamental subroutine for quantum technologies. Credit: Fang & Liu. Quantum technologies, such as quantum computers, quantum sensing devices and quantum memory, have often been found to outperform traditional electronics in speed and performance, and could thus soon…