Articles tagged with Theoretical Physics
Researchers at Cal Poly and an international team are exploring unproven theories related to nuclear decay and the nature of matter. They aim to detect a type of decay that is currently forbidden by physics laws, which could reveal insights into the universe's origins.
Physicists at MIT have made a breakthrough discovery that sheds light on the conditions that lead to exotic electronic states in graphene and other two-dimensional systems. Through calculations, they show that pentalayer graphene can exhibit fractional charge without a magnetic field.
Researchers at the University of Birmingham have developed a new theory that explains how light and matter interact at the quantum level. The theory enables scientists to precisely define the shape of a single photon for the first time.
The FRIB research team has identified a flaw in physics models of massive stars and supernovae, revealing inconsistencies with observational gamma-ray astronomy data. This discovery was made possible by the development of a new experimental method that enabled the team to study short-lived isotopes, including iron-60.
A French-Swiss team has discovered a slight discrepancy between Einstein's predictions and measurements of gravitational lensing from the Dark Energy Survey. The study found that the depth of gravitational wells varied with cosmic history, challenging the validity of Einstein's theories for explaining phenomena beyond our solar system.
Scientists at Brookhaven National Laboratory have demonstrated that complex calculations can accurately predict the distribution of electric charges in mesons. The new predictions match measurements from low-energy experiments and extend into the high-energy regime planned for future collider experiments.
A recent study examines the internal nature of black holes and their implications for astrophysical observations. The research reveals that dynamic black holes are subject to significant instability over short timescales, leading to deviations from known models.
A Virginia Tech-led team is searching for signs of dark matter in billion-year-old rocks. By analyzing crystal lattice structures, they aim to uncover miniature trails of destruction left by long-ago dark matter interactions.
Scientists observe direct interactions between molecular rotations and electronic structures for the first time, shedding light on chemical reaction mechanisms. The study finds that Coriolis coupling, a previously unknown process, plays a dominant role in bond cleavage, lasting several hundred femtoseconds.
Researchers used a classical computer and mathematical models to outperform a quantum computer on a task involving a two-dimensional quantum system of flipping magnets. The system displayed a behavior known as confinement, which had previously been seen only in one-dimensional systems.
Researchers investigate universe expansion, Big Bang, black holes, and dark energy using a time-reversal model. They propose an explanation for the Big Bang and explore interior structure of black holes.
Astronomers can now analyze powerful space explosions more efficiently using a novel model developed by Syracuse University physicist Eric Coughlin. The model helps track the evolution of shockwaves generated during these events, enabling researchers to infer properties such as energy. Coughlin's research will aid in the detection and ...
Dr. Kevin J. Kelly, an assistant professor at Texas A&M University, has received the Henry Primakoff Award for Early-Career Particle Physics for his significant contributions to neutrino physics and proposing novel directions for dark matter research. He will deliver an invited lecture on his research at a future APS meeting.
Researchers at TU Wien have developed computer simulations to investigate the temporal development of quantum entanglement. They found that the 'birth time' of an electron flying away from an atom is related to the state of the remaining electron, demonstrating a quantum-physical superposition.
A new study suggests that Betelgeuse's pulsing is due to an orbiting companion star known as the 'Betelbuddy'. The star acts like a snowplow, pushing light-blocking dust out of the way and making Betelgeuse appear brighter. Researchers used computer simulations to confirm this hypothesis, ruling out other possible causes.
Researchers from the Universiteit van Amsterdam and other institutions show that axion clouds around neutron stars could provide a new way to observe these elusive particles. The formation and properties of these clouds are studied, offering new opportunities for axion research and potentially solving the dark matter puzzle.
A team of researchers at Johannes Gutenberg University Mainz has developed a new method to study the interior of crystalline drops using monochromatic illumination. This approach exploits the color-dependent scattering of light and reveals the density profile of the drop, including initial rapid expansion due to particle repulsion befo...
Researchers propose excited states of neutrons could explain contradictory measurements of average lifetime. These states would have slightly higher energy and different lifetimes, resulting in significant discrepancies between measured results.
Physicists have successfully reproduced properties of atomic nuclei using only quarks and gluons, combining low- and high-energy descriptions. The results provide a unified understanding of the atomic nucleus's structure.
Researchers describe the existence of the paradoxical Mpemba effect within quantum systems, bridging Aristotle's observations and modern-day understanding. The discovery opens doors to 'cool' implications for thermodynamic frameworks and applications in quantum technologies.
Researchers have developed Nucleus++, a new tool for faster and more transparent nuclear data analysis. The software integrates nuclear mass data from the AME and nuclear physics properties from NUBASE, providing enhanced insights for scientists worldwide.
A team of researchers at Argonne National Laboratory has proposed a new type of optical memory that uses quantum defects to store data. By embedding rare-earth emitters in a solid material and transferring energy between them, the researchers aim to create an ultra-high-density storage method that could potentially exceed current limits.
Jenny Hoang, a senior at the University of Texas at Arlington, received the third-place award for her research on diazo compounds. The LSAMP program has inspired her to pursue medical school and encouraged other students to aim for Ph.D.s in physics or particle physics.
Physicists use lattice quantum chromodynamics to calculate how quarks and gluons interact within the proton, revealing a 3D picture of parton distributions. This approach helps explain the proton's spin and distribution of matter, with implications for understanding particle interactions.
Researchers found that for most North Atlantic flights, the climate benefit of avoiding contrails outweighs the extra carbon dioxide emitted from flying a different route. Rerouting flights could reduce global warming by up to 29% in 2039 and 14% in 2119, depending on the method used to measure climate impact.
A team of researchers discovered a universal inequality between energy transfer rate, information transfer rate, and Hilbert space size, showing that both require sufficient states to transmit. This breakthrough sheds new light on the challenging problem of calculating these quantities.
A new study proposes that early dark energy could explain the formation of numerous bright galaxies in the early universe, resolving the 'Hubble tension' puzzle. The team modeled galaxy formation with a brief appearance of early dark energy, finding it fits observations and solves both puzzles.
Researchers Nikolaos Kidonakis and Marco Guzzi have received a third joint NSF grant to continue their study of the Higgs boson, top quark, and proton. The grant supports the university's focus on undergraduate research and advances the field of theoretical particle physics.
Physicists propose a refined way to test the validity of alternative quantum models, which offer a possible explanation for quantum-classical transition. The team found big differences with previous expectations for low-energy X-ray radiation, depending on atomic species and specific collapse model.
UNLV astrophysicists found evidence suggesting the supermassive black hole at the center of our Milky Way galaxy, Sgr A*, is likely the result of a past cosmic merger. The study utilized data from the Event Horizon Telescope's 2022 observation of Sgr A* to investigate various growth models and demonstrated that the misaligned spin prop...
Dr. Zewei Xiong has received an ERC Starting Grant to study collective neutrino oscillations in supernovae and neutron-star mergers. His project NeuTrAE aims to clarify lingering puzzles regarding neutrino flavor evolution, a crucial aspect of particle and nuclear astrophysics.
A new structure of light has been discovered that can accurately measure chirality in molecules, a property of asymmetry important in physics, chemistry, biology, and medicine. This 'chiral vortex' provides an accurate and robust form of measurement, allowing for the detection of chiral biomarkers.
Researchers have successfully achieved spin squeezing in a more accessible way, enabling precise measurements with quantum-enhanced metrology. This breakthrough may lead to new portable sensors for biomedical imaging and atomic clocks.
Researchers at Ohio State University have made the first direct observation of incredibly small time delays in a molecule's electron activity when exposed to X-rays. This breakthrough reveals complex interactions between electrons and other particles, shedding light on intricate molecular dynamics.
Researchers at Rice University and Northeastern University have made a discovery in the fight against COVID-19, uncovering new insights into how the virus infects human cells and can be neutralized. They found that antibodies targeting a specific part of the spike protein can bind to it and prevent the virus from entering human cells.
Researchers develop a modular approach to scaling quantum processors using semiconductor technology and long-distance entangling links. This enables the creation of small arrays of qubits that can be connected to form larger systems, overcoming challenges in controlling individual qubits and maintaining coherence.
A team of researchers has demonstrated a novel way of storing and releasing X-ray pulses at the single photon level, enabling future X-ray quantum technologies. This breakthrough uses nuclear ensembles to create long-lived quantum memories with improved coherence times.
Researchers at the University of Göttingen developed a new approach to analyze cell properties, using random fluctuating movement of microscopic particles. The method, called mean back relaxation (MBR), can distinguish between active processes and temperature-dependent processes.
An international team successfully realizes periodic oscillations and transportation for optical pulses using a synthetic temporal lattice. They observe the features of SBO collapse, including vanishing oscillation amplitude and flip of initial oscillation direction.
Researchers at the University of Bath have discovered a new optical phenomenon called hyper-Raman, which can penetrate deeper into living tissue and yield images with better contrast. This effect has significant potential applications in pharmaceutical science, security, forensics, environmental science, art conservation, and medicine.
Researchers simulate gravitational waves generated by a collapsing warp drive, which could be detectable by future higher-frequency instruments. The study explores the theoretical consequences of a warp drive 'containment failure', pushing boundaries of understanding exotic spacetimes and gravitational waves.
Dr. Wencai Liu, an associate professor at Texas A&M University, has been selected for the 2024 IUPAP Early Career Scientist Prize in Mathematical Physics. His research focuses on linear and nonlinear Schrodinger equations, contributing to our understanding of quantum mechanics and its applications.
A new study by Osaka Metropolitan University researchers suggests that the nuclear structure of titanium-48 changes depending on its distance from the nucleus. The findings provide clues to the α-decay process in heavy nuclei and could help solve a 100-year-old physics mystery.
Karthik Suresh's dissertation on meson decay in GlueX earned him the prestigious 2023 Jefferson Science Associates (JSA) Thesis Prize. His work built upon previous research by Ahmed M. Foda and Amy M. Schertz, contributing to the development of a spectrum of mesons.
A team of physicists from Poland and Germany have successfully calculated the cross-section for Higgs boson production in gluon-gluon collisions. The calculations suggest that no new physics factors are present in the Higgs boson particle.
Researchers at Lancaster University and others are building the most sensitive dark matter detectors using quantum technologies. They aim to detect dark matter particles weighing between 0.01 to a few hydrogen atoms, which could reveal the mass and interactions of these mysterious particles.
Researchers used neutron beams to test the Leggett-Garg inequality, a formula that challenges macroscopic realism. The results show that classical explanations are not possible, confirming quantum theory's strange properties.
Researchers successfully controlled Andreev bound states in bilayer graphene-based Josephson junctions using gate voltage, observing changes in real-time and confirming theoretical predictions. The discovery enables adjustment of energy levels, opening potential for diverse applications.
Theoretical physicists at Utrecht University have discovered that fractals might hold the key to making electric currents flow without energy loss. By growing fractal structures on top of semiconductors, scientists have created materials with zero-dimensional corner modes and lossless one-dimensional edge states.
Research using a novel microscopic technique reveals that gold nanoparticles' lethality to cancer cells is more complex than previously thought. Smaller nanoparticles can regenerate and divide after initial stress, while larger star-shaped particles cause oxidative stress leading to programmed cell death.
A team of researchers from TU Wien and the University of Manchester demonstrated the control of thermal radiation by manipulating its topological properties. They created a coating with varying metal layer thickness along the coastline of the British Isles, allowing for localized heat emission at specific points.
Researchers at TU Wien have developed a theory to extract information from waves, allowing for precise measurements of objects in space. The theory reveals that the information content of a wave depends on its interaction with the object's properties, enabling customised waves to be generated for optimal information transfer.
Researchers suggest microscopic, ultradense black holes formed in first quintillionth of a second after Big Bang may have produced smaller, super-charged black holes with unprecedented nuclear charge. These tiny, 'super-charged' black holes could have influenced atomic nucleus formation and detection.
Sean McWilliams' team will study stellar-mass and massive binary inspirals, improving modeling accuracy for the Laser Interferometer Space Antenna (LISA). The project aims to enhance the instrument's science mission by making necessary dramatic improvements in modeling accuracy.
The Facility for Rare Isotope Beams' (FRIB) precision measurement program has verified the existence of a proton halo around aluminum-22. Researchers used a unique process to create and measure a high-energy beam of the isotope, achieving accurate mass measurements that confirm its rare properties.
Holly Szumila-Vance has won the prestigious 2024 Guido Altarelli Award – Experimental Physics for her outstanding contributions to investigations of color transparency and other nuclear manifestations of QCD. Her work revealed new details of how protons interact with the strong force inside matter, but did not observe color transparent...
Researchers demonstrate a way to describe spin-boson systems and efficiently configure quantum devices in a desired state. Non-Gaussian states are used to retain powerful mathematical machinery while describing diverse quantum states.
Researchers found that a photon's polarization is topological, meaning it doesn't change as it moves through materials and environments. This property can help design better light beams for heating and measuring plasma, which could increase fusion efficiency.
Researchers from the Polish Academy of Sciences find that wave phenomena, like sound waves, may be responsible for heat transport in complex systems. The study uses the telegraph equation to describe how electric current propagates with attenuation along one spatial dimension.
Researchers discover a microscopic phenomenon that enables hydrogels to swell and contract quickly, improving the flexibility of soft robots. This breakthrough could lead to faster and more agile robots with applications in healthcare, manufacturing, and search and rescue operations.