Coherent oscillation between phonons and magnons
Two different waves with the same frequency and wavelengths can be coupled, so that the amplitude alternates periodically between the two to form a phenomenon known as a coherent beating oscillation. The process can be observed often with a coupled p.....»»
Study uncovers giant fluctuation-enhanced phonon magnetic moments in a polar antiferromagnet
Phonons, quasi-particles associated with sounds or lattice vibrations, can carry momentum and angular momentum. However, these quasi-particles are commonly considered to possess negligible magnetic moments......»»
New method proposed to improve the ocean observational network in the tropical western Pacific
ENSO, short for the El Niño and Southern Oscillation, is the most influential interannual oscillation, and significantly impacts global climate. The Tropical Pacific Observation System (TPOS), including moored buoys, plays an important role in under.....»»
Uncovering the secrets of spin-orbit optical Rabi oscillations
The Rabi oscillation has been proven to be one of the cornerstones of quantum mechanics, triggering substantial investigations in different disciplines including atomic and molecular physics, acoustics, and optics. Various important applications have.....»»
Denso, Mitsubishi Electric to invest $1 billion in Coherent’s silicon carbide unit that supplies EVs
Silicon carbide is more efficient than traditional silicon chips and has been used in some EVs, including Tesla vehicles, to speed charging and extend range......»»
Weakening of the relationship between winter precipitation over southern China and the Asian–Pacific Oscillation
Pacific Oscillation (APO), a dominant mode of atmospheric variability characterized by a seesaw variation in the upper-tropospheric temperature between Asia and the North Pacific, plays important roles in the atmospheric circulation and climate of Ea.....»»
SLAC fires up the world"s most powerful X-ray laser: LCLS-II ushers in a new era of science
The newly upgraded Linac Coherent Light Source (LCLS) X-ray free-electron laser (XFEL) at the Department of Energy's SLAC National Accelerator Laboratory successfully produced its first X-rays, and researchers around the world are already lined up to.....»»
New set of equations predicts hydrodynamic behavior of magnons in a magnet
The term "quantum transport" may conjure images of a fantastic futuristic commuting option. In condensed matter physics, however, this is a fundamental concept in the hydrodynamics of electrons in solid and fluid materials......»»
Atomic-scale spin-optical laser: New horizon for optoelectronic devices
Researchers at the Technion—Israel Institute of Technology have developed a coherent and controllable spin-optical laser based on a single atomic layer. This discovery is enabled by coherent spin-dependent interactions between a single atomic layer.....»»
Three types of boreal summer intraseasonal oscillation found to influence precipitation over the Yangtze River Valley
The Yangtze River Valley (YRV) is one of the most densely populated and economically developed regions in China. Summer precipitation over this region shows considerable intraseasonal variability with a period of 10–90 days, which can induce extrem.....»»
Manipulating polaron transport via laser-induced coherent phonons
Polarons are quasiparticles composed of excess electrons dressed with virtual phonon clouds. They are ubiquitous in materials and play a key role in various physicochemical properties, including superconductivity, photocatalysis and ferroelectricity......»»
North Atlantic Oscillation contributes to "cold blob" in Atlantic Ocean
A patch of ocean in the North Atlantic is stubbornly cooling while much of the planet warms. This anomaly—dubbed the "cold blob"—has been linked to changes in ocean circulation, but a new study found changes in large-scale atmospheric patterns ma.....»»
Complex-domain neural network advances large-scale coherent imaging
Computational imaging has the potential to revolutionize optical imaging by providing wide field-of-view and high-resolution capabilities. Joint reconstruction of amplitude and phase—known as "coherent imaging or holographic imaging"—expands the.....»»
Global warming will cause more multiyear La Niña events, study finds
Southern Oscillation (ENSO) is the Earth's most consequential interannual climate fluctuation. Alternating irregularly between warm El Niño and cold La Niña phases, it brings shifts in ocean surface temperature and disrupts wind and rainfall patter.....»»
Study finds a solution to longstanding problem of ultrafast valley decoherence
Since the realization that a linearly polarized light can create K-K' valley coherent excitons in monolayer transition metal dichalcogenide (TMDC) semiconductors back in 2013, it has been a longstanding goal for researchers to use these excitonic sta.....»»
Models provide new insights into relationship between Asia-Pacific upper-tropospheric temperatures and precipitation
Pacific Oscillation (APO) is a recently identified atmospheric teleconnection pattern in the Asia-Pacific sector characterized by a seesaw vibration of upper-tropospheric temperatures between Asia and the North Pacific. Teleconnections are links betw.....»»
Researchers reveal how a key weather system in Northeast China is modulated by El Niño
Southern Oscillation (ENSO) is a recurring climate pattern involving changes in the temperature of waters in the central and eastern tropical Pacific Ocean......»»
Researchers achieve coherent control of two-dimensional material solid-state spin defects
A team led by Prof. Guo Guangcan, with the collaborative efforts from Wigner Research Centre for Physics, revealed a new approach to discovering a new spin defect with an excellent probability of 85% and achieved coherent control of an ultrabright si.....»»
Phonons can be chiral: Study claims to settle the debate
Findings published in Nature settle the dispute: phonons can be chiral. This fundamental concept, discovered using circular X-ray light, sees phonons twisting like a corkscrew through quartz......»»
Order in chaos: Atmosphere"s Antarctic oscillation has natural cycle, discover researchers
Climate scientists at Rice University have discovered an "internally generated periodicity"—a natural cycle that repeats every 150 days—in the north-south oscillation of atmospheric pressure patterns that drive the movement of the Southern Hemisp.....»»
Symmetry breaking by ultrashort light pulses opens new quantum pathways for coherent phonons
Atoms in a crystal form a regular lattice, in which they can move over small distances from their equilibrium positions. Such phonon excitations are represented by quantum states. A superposition of phonon states defines a so-called phonon wavepacket.....»»