Articles tagged with Electromagnetic Fields
Researchers have discovered that altering the interface between two materials in time can lead to new opportunities for wave manipulation. This breakthrough enables novel concepts and applications in photonics, including nonreciprocal gain, power steering, and optical drag.
Researchers at City University of Hong Kong have developed a novel droplet manipulation method called WRAP, which can transport micro-sized droplets using electromagnets or programmable electromagnetic fields. The method overcomes challenges in traditional magnetic actuation, such as contamination from added magnetic particles.
Researchers at Peking University developed a microsensor that leverages whispering gallery modes to detect single DNA molecules with improved sensitivity. The interface mode outperforms traditional evanescent field-based sensors, offering ultra-small sample consumption and automatic analysis capabilities.
A comprehensive guideline for exploring nanoscale flexoelectricity via AFM tip pressing has been developed by a joint team of researchers. The method allows for the control of flexoelectricity in nanometer-sized materials, showing potential applications as generators and actuators in nanoscale units.
Researchers discovered a complex relationship between Jupiter's magnetic field, volcanic activity on its moon Io, and the planet's powerful aurorae. The study revealed an electromagnetic 'tug-of-war' lights up aurorae in Jupiter's upper atmosphere.
Researchers at Aalto University have developed a power transfer technology that allows for wireless charging regardless of device position or orientation. The system uses a grid of transmitters and receivers to capture magnetic flux, generating an electric current to charge devices.
Scientists at Osaka University demonstrated the ability to generate gigagauss magnetic fields via gyro motion of relativistic electrons, with polarity reverse occurring instantly. The study, published in Scientific Reports, reveals a new mechanism for magnetic field growth and amplification.
A physicist at Lancaster University has suggested an alternative approach to calculate radiation reaction, which has sparked controversy. The proposed method considers the effects of many charged particles on each other's fields, rather than self-interaction, leading to new insights into energy and momentum conservation.
A team of researchers demonstrates an adaptive optimization protocol that can engineer arbitrary high-dimensional quantum states, overcoming limitations due to noise and experimental imperfections. The protocol uses measured agreement between produced and target state to tune experimental parameters.
A new study by ISGlobal found no association between overall mobile device exposure and sleep disturbances in pre-adolescents, but suggested an effect on sleep when exposure occurs in the evening. The study of over 1,500 children aged 9-12 years old found that those making phone calls in the evening had reduced sleep time.
Researchers at Lancaster University successfully transferred digitally encoded information wirelessly using nuclear radiation, achieving 100% successful transmission tests. This novel approach uses fast neutrons, which can penetrate materials like metals, making it ideal for safety-critical scenarios and emergency rescue operations.
Researchers have made a significant advance in shrinking the size of particle accelerators by using intense lasers and plasmas. They demonstrated functional equivalent of a confining metal tube waveguide, generating plasma waveguiding of up to 300-terawatt laser pulses, and accelerating electrons up to 5 GeV over a distance of only 20 cm.
Scientists at USTC localized electromagnetic fields down to 10^-6 wavelength, increasing field intensity by 2.0×10^8 times and interaction strength by 1.4×10^4 times. This breakthrough enables high-spatial-resolution quantum sensing in nanoscience.
The AI optimization improves the motor's power factor, reducing disruptions to the power grid. The optimized motor shows excellent performance, with improved efficiency and increased torque while drawing less current.
Researchers propose a solution using tethered unmanned aerial vehicles (TUAVs) to receive signals while minimizing uplink exposure. The system uses low-power 'green antennas' that only receive signals and do not radiate EMF, offering increased data transfer speeds.
Researchers at Osaka City University have successfully stored electricity using ferromagnetic resonance (FMR) in ultra-thin magnetic films. The team found that two alloys, Ni80Fe20 and Co50Fe50, generated varying amounts of electricity under FMR, with Co50Fe50 showing a steady increase in energy storage over time.
The team successfully controlled spin defects in a layered crystal of boron nitride, even at room temperature. This achievement opens up new avenues for precise measurements of local electromagnetic fields, with potential applications in medicine, navigation, and information technology.
Scientists at Graz University of Technology have successfully imaged surface phonons in three dimensions, revealing the spatial distribution of electromagnetic fields near nanosurfaces. This breakthrough could lead to improved thermal conduction, sensor technology, and energy storage.
Researchers at Osaka University developed a numerical method to visualize how signals propagate and radiate in electromagnetic circuits. The simulator considers both conduction and radiation phenomena, enabling the prediction of electromagnetic noise in circuit designing stages. This breakthrough aims to reduce power consumption and pr...
A recent study published in Bioelectricity found that electromagnetic fields can hinder the spread of breast cancer cells, slowing their metabolism and potentially stopping them from moving. Researchers believe this approach may be useful in fighting highly metastatic cancers.
Researchers at the University of Warsaw have demonstrated how to structure light to exhibit collective spin behavior like a ferromagnet. They trapped light in a thin liquid crystal layer between mirrors and observed first-order and second-order merons and anti-merons, which can be used to study complex systems.
Maxwell knots are peculiar solutions to the Maxwell equations, with unique electric and magnetic field line structures. The study suggests these knotted field lines may move in a special manner, preserving their knot nature, and could be integrable, linking them to other mathematical models.
Researchers at Drexel University have developed MXene-coated fabrics that block electromagnetic waves and radiation, exceeding the performance of commercial metal-coated fabrics. The materials can be sustainably produced by coating form aqueous solution without extra processing or chemical additives.
Researchers developed an all-optical attosecond few slit interferometer to measure ultrafast processes in the time-energy domain. The technique uses laser-driven high order harmonics and introduces a perturbing field to alter harmonic generation, enabling wave-front controlled attosecond interferometry with precise energy resolution.
Researchers demonstrate the existence of exotic Bloch oscillations in crystals with intrinsic non-Abelian fields, characterized by a multiplication of the oscillation period. These phenomena are perfectly synchronized with internal states of the crystal and shed new light on topological quantum matter.
Scientists have solved the Casimir puzzle by accounting for energy losses of conduction electrons in metals, leading to agreement between theory and high-precision measurements. The new approach takes into account both real and virtual fluctuations, enabling reliable calculation and creation of miniature nanodevices.
Theoretical physicists have shown how a position-dependent mass optomechanical system can slow down light in an optical cavity. This innovation enhances optomechanically induced transparency (OMIT) and has significant applications in quantum information processing, optical switches, and sensing.
A team of Indian and Japanese physicists have overturned the six-decade old notion that giant magnetic fields in plasma evolve from small scales. Instead, they originate at macroscopic scales defined by the boundaries of electron beams, leading to a new understanding of magnetic fields in astrophysical scenarios and laser fusion.
Researchers discuss theoretical frameworks for electromagnetic chirality in chiral materials and fields, enabling understanding of complex chiroptical phenomena. Chirality is a qualitative property but measurable quantities can be described using chiroptical parameters.
A team of UChicago scientists developed a technique that allows quantum systems to stay operational for up to 22 milliseconds, four orders of magnitude higher than before. This breakthrough has the potential to revolutionize quantum communication, computing, and sensing by enabling new research opportunities in quantum engineering.
Researchers at Swiss Federal Laboratories for Materials Science and Technology create a composite of cellulose nanofibers and silver nanowires, achieving impressive shielding effectiveness. The resulting aerogel is incredibly light, flexible, and durable, with high shielding capabilities against electromagnetic radiation.
Researchers explore high-intensity lasers to create plasmas for studying quantum electrodynamics, a lesser-studied corner of particle physics. The findings could lead to advances in fundamental physics and scanning technology.
A Tel Aviv University study reveals a direct connection between electrical fields in the atmosphere and those found in living organisms, including humans. This finding may lead to revolutionary medical treatments for illnesses such as epilepsy and Parkinson's disease.
Pulsed electromagnetic field therapy significantly decreases prostate volume and improves lower urinary tract symptoms in men with benign prostatic hyperplasia. Men without metabolic syndrome benefit most from the treatment.
A new study published in Technology and Health Care reveals that four leading electric car brands do not trigger electromagnetic interference with cardiac implantable electronic devices. The research, which tested over 100 CIED patients driving and charging four e-cars, provides reassuring evidence for pacemaker users.
Entangling disparate electromagnetic fields with a vibrating membrane creates novel ways to solve the long-standing challenge of sharing entanglement between distant quantum computers. The result enables microwave-optical entanglement, a key step towards solving this problem.
The new guidelines establish evidence-based limits for exposure to high-frequency electromagnetic fields, setting thresholds below which no adverse effects can occur. The report provides guidance on basic restrictions and reference levels to ensure safe exposure in various settings, including occupational environments.
Researchers at MIT have extended Maxwell's electromagnetism to smaller scales, bridging the gap between macroscopic and nanoscale phenomena. The new model incorporates electronic length scales, enabling nonclassical effects such as nonlocality and surface-enabled Landau damping.
New research reveals a novel explanation for the origin of cosmic magnetic fields, potentially solving a long-standing puzzle. The study suggests that strong primordial electric fields can be responsible for generating magnetic fields after inflation.
Researchers have developed an analytical tool to design nano-antennae that can amplify electromagnetic fields of desired frequencies or polarizations. The corkscrew-shaped nano-antennae are highly sensitive to light, allowing for novel applications in information technology and sensor technology.
The study models a system using light to generate an electromagnetic field, polarizing neutral nanoparticles made of insulating materials. The technique has the potential to provide thrust for tiny spacecraft without an electrical power supply.
Researchers have made substantial progress in engineering quantized gauge fields coupled to ultracold matter, a versatile platform for tackling complex problems in physics. By controlling the Peierls phase, neutral atoms can mimic charged particles moving in magnetic fields.
Researchers at Ohio State University found that low-intensity electromagnetic fields reduce the ability of specific breast cancer cells to migrate and spread. The study used a lab model to mimic the body environment and discovered that certain drug therapies can enhance the effects of electromagnetic fields on blocking cancer cell meta...
A new study reveals that pulsed electromagnetic fields (PEMFs) increase osteoblast precursor cell proliferation and induce osteogenic gene expression, but do not enhance calcium deposition. Careful selection of PEMF parameters is crucial for inducing a favorable effect.
A team at Chalmers University of Technology has proposed creating ultra-intense light pulses to study interactions between matter and light. These pulses can be used to probe and control matter in unique ways, offering new insights into material science and quantum states.
A new study by Tel Aviv University researchers suggests that extremely low frequency electromagnetic fields from lightning, known as Schumann Resonances, may protect cells from damage under stress conditions. The study found significant effects on living heart cells of rats within 30-40 minutes when exposed to these fields.
Researchers successfully captured chorus wave packets and transient auroral flashes simultaneously, revealing details of wave-particle interaction regions. The observation confirms geomagnetic north-south asymmetry and suggests rapid precipitation of energetic electrons into the atmosphere.
Researchers from Nagoya University used ultrafast measurements to study wave-particle interactions in the Earth's magnetosphere. They observed two-way energy transfer between particles and fields via electromagnetic ion cyclotron waves, resolving a long-standing observation challenge.
Physicists from the University of Tokyo have generated a record-breaking magnetic field of 1,200 teslas using electromagnetic flux compression. The field was sustained for over 100 microseconds, far exceeding previous records. This achievement has significant implications for material science and fusion power generation.
Researchers have demonstrated graphene's ability to convert electronic signals at gigahertz frequencies into signals at several times higher frequencies, paving the way for ultrafast graphene-based nanoelectronics. The breakthrough achieved using a novel terahertz radiation source enables efficient frequency multiplication in graphene.
Scientists from ITMO University discovered that the Great Pyramid can concentrate electromagnetic energy in its internal chambers and base. The research used numerical modeling and analytical methods to predict this phenomenon, which could lead to the development of nanoparticles for sensors and solar cells.
The Higgs boson-top quark coupling has been observed at the LHC, confirming theoretical predictions of the Standard Model. The detection was made possible by an increase in the collider's energy, allowing for the distinction between two points as small as 10-18 m apart.
Scientists at Hokkaido University have developed a theoretical approach to quantum computing that uses light squeezing to dramatically reduce errors. This new method is ten billion times more tolerant of errors than current experimental methods, bringing us closer to developing ultra-accurate quantum computers.
Researchers have successfully observed the quantum mechanical Einstein-Podolsky-Rosen paradox in a system of several hundred interacting atoms, demonstrating precise predictions of measurement results. This breakthrough has implications for new sensors and imaging methods for electromagnetic fields.
Researchers at Duke University have developed a water cloaking concept that uses electromagnetic forces to eliminate an object's wake and drag. By matching the acceleration of the surrounding water to an object's movement, it is theoretically possible to greatly increase propulsion efficiency while leaving the surrounding sea undisturbed.
Researchers developed a tracking system using NFER sensors to monitor ICU nurses' daily tasks, enabling more efficient planning of nurse shifts and hospital unit design. The study aims to advance understanding of ICU nurses' workflow and improve healthcare delivery processes.
Research at RIT develops new precision quantum sensing solutions using levitated optomechanics, capturing data with improved accuracy. The study aims to create smaller and lighter sensors for various applications, including detecting gravitational waves and perfecting quantum computing.
Researchers from Lomonosov Moscow State University directly measured giant resonant fields in subwavelength dielectric particles, overcoming measurement difficulties by using radio waves. The study provides theoretical explanation and has potential applications in medicine, biology, telecommunications, and optical computing.
Researchers have discovered a novel approach to controlling quanta using the tennis racket effect, which can visualize fault-tolerant manipulation of quanta. This breakthrough enables faster and more efficient quantum computing, with potential applications in secure networks and ultrafast quantum computers.
Research published in Occupational & Environmental Medicine found a doubling of ALS risk among men exposed to very low frequency electromagnetic fields at work. High levels of exposure were associated with nearly twice the likelihood of developing the disease.