Temporarily apart
Researchers induced fast switching between electrically neutral and charged luminescent particles in an ultra-thin, two-dimensional material. The result opens up new perspectives for optical data processing and flexible detectors.
Experimental Physics
Articles tagged with Experimental Physics
UT Arlington scientists part of neutrino discovery
The UT Arlington Neutrino Group has successfully identified the detector's neutrino interactions for the first time in a decade-long project. The group's work on the SBND experiment aims to study neutrino oscillation and search for evidence of a fourth neutrino, with the potential to redefine our understanding of the universe.
Mapping out matter’s building blocks in 3D
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.
Electrically modulated light antenna points the way to faster computer chips
A research team at the University of Würzburg has achieved electrically controlled modulation of light antennas, paving the way for ultra-fast active plasmonics. This breakthrough could lead to significantly faster computer chips and new insights into energy conversion and storage technologies.
X-rays from atomic systems could reveal new clues about rival quantum theories
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.
Postdoc takes multipronged approach to muon detection
Debaditya Biswas combines different particle identification methods with machine learning to detect muons hidden in a sea of pions. He plans to simulate reactions and assess the viability of various techniques, including traditional PID, PSD, and machine learning, to optimize muon detection for future experiments.
Atoms on the edge
Researchers at MIT have directly observed edge states in a cloud of ultracold atoms, capturing images of atoms flowing along a boundary without resistance. This discovery could enable super-efficient energy transmission and data transfer in materials.
Cytophysics: how cell nuclei squeeze through
LMU researchers investigated how cell nuclei change shape to migrate through tight spaces, revealing reversible nuclear deformation and adaptation of pulling and pushing forces. The study suggests a biphasic dependence of migration speed on channel width, with maximal transition rates at widths comparable to the nuclear diameter.
Advancement in particle physics: New encoding mechanism unveiled
Researchers have introduced a novel particle encoding mechanism that addresses longstanding issues in particle identification, enabling precise digital representation of complex particles. This new method is adaptable for future discoveries and has the potential to unlock new frontiers in particle physics.
Würzburg theory confirmed: Kagome superconductor makes waves
Researchers confirm Kagome superconductor, a class of materials with star-shaped structure exhibiting unique electronic, magnetic, and superconducting properties. The discovery enables novel electronic components, such as superconducting diodes, with potential for energy-efficient quantum devices.
Mary Bishai named Distinguished Scientist Fellow
Mary Bishai, a Brookhaven physicist, has been recognized as a Distinguished Scientist Fellow by the DOE Office of Science. Her work on understanding neutrinos' properties has led to extraordinary leadership and service to the particle physics community. As a mentor, she is guiding the next generation of researchers.
Achieving quantum memory in the hard X-ray range
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.
European X-ray laser explores a poorly understood state of matter
Physicists at European XFEL have made comprehensive observations of ionisation processes in warm dense matter. The team observed how quickly copper transforms into the exotic state of ionised WDM to become transparent to X-rays.
Physicists use light to probe deeper into the ‘invisible’ energy states of molecules
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.
Chasing and counting mesons
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.
Powerful new particle accelerator a step closer with muon-marshalling technology
Researchers at Imperial College London have successfully demonstrated muon-marshalling technology, a key step towards building a muon collider. The breakthrough enables more efficient high-energy collisions, revolutionizing particle accelerator research and potential applications.
European XFEL reaches unmatched level in measurements of matter under extreme conditions
Scientists at European XFEL have developed a new method to study warm dense matter, allowing for unprecedented insights into its structure and properties. This breakthrough enables the investigation of plasmons in ambient aluminum with ultra-high-resolution X-ray Thomson scattering.
A breakthrough on the edge: One step closer to topological quantum computing
A team of experimental physicists has achieved a breakthrough in topological quantum computing by inducing superconducting effects in edge-only materials. This discovery could lead to the development of stable and efficient quantum computers, with potential applications in fields like quantum computing and technological advancements.
Controlling magnetism with polarized light
Researchers from the Max Born Institute have developed a method to manipulate magnetism using circularly polarized XUV radiation, generating large magnetization changes without thermal effects. The study demonstrates an effective non-thermal approach to controlling magnetism on ultrafast time scales.
Can a computer chip have zero energy loss in 1.58 dimensions?
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.
Magnetic excitations can be held together by repulsive interactions
Physicists at the University of Cologne have discovered that magnetic elementary excitations in BaCo2V2O8 crystals are bound by both attractive and repulsive interactions. The study found that repulsively bound states, which were unexpected due to their lower stability, can exist in these materials.
Gold nanoparticles kill cancer – but not as thought
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.
Fundamental spatial limits of all-optical magnetization switching
A team of researchers has determined a fundamental spatial limit for light-driven magnetization reversal in nanometer-scale materials. They found that the minimum size for all-optical switching is around 25 nm due to ultrafast lateral electron diffusion, which rapidly cools illuminated regions.
Precision instrument bolsters efforts to find elusive dark energy
Researchers have built the most precise experiment yet to look for gravitational anomalies caused by dark energy, using a lattice atom interferometer that can hold atoms in place for up to 70 seconds. While no deviation from predicted theory was found, the improved precision opens up possibilities for probing gravity at the quantum level.
Breakthrough research uncovers hidden phenomena in ultra-clean quantum materials
Researchers have discovered unusual transport phenomena in ultra-clean SrVO3 samples, contradicting long-standing scientific consensus. The study's findings challenge theoretical models of electron correlation effects and offer insights into the behavior of transparent metals.
Quantum state mixing in photobiology – new insight from ultrafast terahertz Stark spectroscopy
Researchers used ultrafast terahertz Stark spectroscopy to characterize the molecular quantum states involved in the proton pump reaction of bacteriorhodopsin. The study reveals pronounced quantum state mixing in the early electronic and nuclear dynamics, supporting a picture of mixed excited-state characters.
Uncovering the nature of emergent magnetic monopoles
Scientists have discovered unique periodic structures in manganese germanide that behave like magnetic monopoles and antimonopoles. The researchers studied the collective excitation modes of these structures, revealing a way to experimentally determine their spatial configuration.
MOLLER experiment baselined and moving forward
The MOLLER experiment aims to make a precise measurement of the electron's weak charge, probing its interactions with other subatomic particles. This will provide a stringent test of the Standard Model, revealing valuable insights into fundamental forces.
Toward testing the quantum behavior of gravity: A photonic quantum simulation
A team of researchers successfully demonstrated the principles of gravity-mediated entanglement in a photonic quantum simulation. This breakthrough provides crucial insights into the nature of gravity and its interaction with quantum mechanics.
The coldest lab in New York has a new quantum offering
Researchers at Columbia University have successfully created a unique quantum state of matter called a Bose-Einstein Condensate (BEC) out of molecules. The breakthrough, achieved by cooling sodium-cesium molecules to just five nanoKelvin, has the potential to advance powerful quantum simulations and unlock new areas of research.
New FRIB precision measurement program advances understanding of proton halos
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.
Experimental physics leads to award-winning research
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...
Theory and experiment combine to shine a new light on proton spin
A recent study combines experimental data with state-of-the-art calculations to reveal new details on the origins of proton spin. The research shows that gluons, which hold protons together, contribute significantly to the proton's spin, contradicting earlier findings.
Helping qubits stay in sync
Researchers at Washington University in St. Louis have developed a new technique to enhance quantum entanglement stability in qubits. This breakthrough addresses the challenges of maintaining coherence and reliability in quantum systems.
What is "time" for quantum particles?
Physicists from TU Darmstadt propose a new approach to define and measure the time required for quantum tunneling. They suggest using Ramsey clocks, which utilize the oscillation of atoms to determine the elapsed time. The proposed method may correct previous experiments that observed particles moving faster than light during tunneling.
Princeton physicists reveal the microscopic basis of a new form of quantum magnetism
Physicists from Princeton University have discovered the microscopic basis of kinetic magnetism, a novel form of quantum magnetism. They directly imaged the unusual type of polaron that gives rise to this magnetism, using ultracold atoms in an artificial laser-built lattice.
The interference of many atoms, and a new approach to boson sampling
Researchers demonstrate novel method of boson sampling using ultracold atoms in a two-dimensional optical lattice, overcoming previous limitations in simulations and photon-based experiments. The achievement showcases the potential of quantum devices for performing non-classical computational tasks.
Experiment opens door for millions of qubits on one chip
Researchers at the University of Basel and NCCR SPIN have successfully coupled two hole-spin qubits, enabling fast and precise controlled spin-flip operations. This achievement is a significant milestone in the quest for practical quantum computing, with millions of qubits on a single chip.
Attosecond core-level spectroscopy reveals real-time molecular dynamics
Scientists have developed a powerful tool to investigate molecular dynamics in real-time, tracing the evolution of gas-phase furan and uncovering its ring-opening dynamics. The technique, based on attosecond core-level spectroscopy, provides an extremely detailed picture of the relaxation process.
Researchers find unexpected roadblock to conductivity in Mott insulators
A new theory explains why one type of Mott insulator resists conducting electricity even with added electrons. The material's lattice structure interacts with trapped electronic charge to form bipolarons, acting as roadblocks for electron movement.
Physicists arrange atoms in extremely close proximity
MIT physicists arrange dysprosium atoms as close as 50 nanometers apart, a limit previously set by the wavelength of light. This allows for enhanced magnetic forces, thermalization, and synchronized oscillations, opening new possibilities for studying quantum phenomena.
Revealing the quantumness of gravity
Researchers propose an experiment to test the quantum nature of gravity without relying on entanglement. By using massive harmonic oscillators, they aim to reveal the quantumness of gravity in a way that was previously challenging due to the difficulty in creating heavy mass states.
When does a conductor not conduct?
A new atomically-thin material has been discovered that can switch between an insulating and conducting state by controlling the number of electrons. This property makes it a promising candidate for use in electronic devices such as transistors.
Making light ‘feel’ a magnetic field like an electron would
Researchers at Penn State have made light effectively experience a magnetic field within a photonic crystal structure. This breakthrough could lead to more efficient lasers and other photonic technologies by increasing the interaction between light and matter.
Scientists trigger mini-earthquakes in the lab
Researchers at the Universiteit van Amsterdam triggered mini-earthquakes in a lab by applying a small seismic wave to a granular material. The study shows that these events can be understood using laboratory-scale frictional experiments, and its findings are relevant for understanding remote earthquake triggering in larger faults.
Quantum crystal of frozen electrons—the Wigner crystal—is visualized for the first time
Physicists at Princeton University have successfully visualized the Wigner crystal, a quantum phase of matter composed of electron crystals. The team used a scanning tunneling microscope to directly image the crystal, confirming its properties and enabling further study.
Novel UV broadband spectrometer revolutionizes air pollutant analysis
The novel UV broadband spectrometer enables real-time analysis of air pollutants and their interaction with other gases and sunlight. It combines high spectral resolution, short measurement times, and large bandwidth, making it suitable for sensitive measurements and monitoring of gas concentrations.
Researchers at Goethe University Frankfurt visualize quantum effects in electron waves
A German-Chinese team at Goethe University Frankfurt has successfully visualized the temporal evolution of electron waves using the Kapitza-Dirac effect. The researchers measured the time-dependent interaction between free electrons and ultrashort laser pulses, opening up exciting applications in quantum physics.
Magnetic avalanche triggered by quantum effects
Researchers at Caltech have demonstrated quantum Barkhausen noise, which is the collection of little magnets flipping in groups. This effect is caused by quantum tunneling and co-tunneling, leading to macroscopic changes in magnetization, even without classical effects.
Scientists propose a new way to search for dark matter
Researchers at SLAC National Accelerator Laboratory propose detecting thermalized dark matter, which builds up on Earth's surface, using quantum sensors. The study suggests that superconducting quantum devices could be redesigned to detect low-energy galactic dark matter particles.
Scientists on the hunt for evidence of quantum gravity’s existence at the South Pole
A team from the University of Copenhagen contributed to an Antarctic experiment studying neutrinos, which may hold the answer to whether gravity also exists at the quantum level. The study found no conclusive changes in neutrino properties, but the results do not exclude the possibility of quantum gravity.
Artificial intelligence to reconstruct particle paths leading to new physics
Researchers from the Institute of Nuclear Physics propose using AI to reconstruct particle tracks, which will be crucial for experiments finding new physics. The proposed method uses a deep neural network trained on simulated data and achieves accurate results comparable to classical algorithms.
Spectroscopy and theory shed light on excitons in semiconductors
Researchers have developed a new method to visualize the quantum mechanical wave function of excitons in organic semiconductors. This understanding is essential for developing more efficient materials with organic semiconductors. The technique, known as photoemission exciton tomography, provides insights into the behavior of excitons i...
Good prospects for altermagnets in spin-based electronics
Researchers at Johannes Gutenberg Universitaet Mainz have demonstrated altermagnetic electronic band splitting associated with spin polarization in CrSb, a good conductor at room temperature. The magnitude of this splitting is extraordinary and promises electronic applications for altemagnets.
Ben-Gurion University scientists propose new theory that explains sand ripples on Mars and on Earth
Ben-Gurion University scientists propose a unified theory that explains sand ripples on Mars and Earth, suggesting common causes despite different planetary environments. The research was conducted using wind tunnel experiments and reveals the possibility of similar patterns on Earth.
Network of quantum sensors boosts precision
Physicists have developed a method to make quantum signals accessible again by analyzing simultaneous changes in states of multiple sensors. This approach enables precise measurement of magnetic field variations and distance between sensors, outperforming entanglement-based methods.
Scientists make nanoparticles dance to unravel quantum limits
Researchers demonstrate a way to amplify interactions between particles to overcome environmental noise, enabling the study of entanglement in larger systems. This breakthrough holds promise for practical applications in sensor technology and environmental monitoring.
Laser-focused look at spinning electrons shatters world record for precision
Researchers at Jefferson Lab shattered a nearly 30-year-old record for parallel spin measurement within an electron beam, achieving unprecedented precision. This achievement sets the stage for high-profile experiments that could lead to groundbreaking discoveries in physics.
Scientists closer to solving mysteries of universe after measuring gravity in quantum world
Physicists at the University of Southampton successfully detect weak gravitational pull on microscopic particles using a new technique. The experiment, published in Science Advances, could pave the way to finding the elusive quantum gravity theory.
Laboratory study on conditions for spontaneous excitation of "chorus emission," wave of space plasma
Researchers successfully conduct laboratory studies on whistler mode chorus emission using the RT-1 device, a magnetically levitated superconducting coil. The findings reveal that high-temperature electrons drive the generation of chorus emission, while increasing plasma density suppresses its occurrence.