Mathematics & Physics articlesPhysicists trap, map tiny magnetic vortex
In a research first that could lead to a new generation of hard drives capable of storing thousands of movies per square inch, physicists at Rice University have decoded the three-dimensional structure of a tornado-like magnetic vortex no larger than a red blood cell.
Mathematician uses topology to study abstract spaces, solve problems
Studying complex systems, such as the movement of robots on a factory floor, the motion of air over a wing, or the effectiveness of a security network, can present huge challenges. Mathematician Robert Ghrist at the University of Illinois at Urbana-Champaign is developing advanced mathematical tools to simplify such tasks.
Physicists observe subatomic quick-change artist
It's taken 19 long years of painstaking, high-precision experiments, but it's finally official: Physicists have announced the observation of a subatomic particle known as the Bs (pronounced "B sub s") meson switching between matter and antimatter states at a mind-boggling 3 trillion times per second.
The point of icicles
Contemplating some of nature's cool creations is always fun. Now a team of scientists from The University of Arizona in Tucson has figured out the physics of how drips of icy water can swell into the skinny spikes known as icicles.
From zero to a billion electron volts in 3,3 centimeters
In a precedent-shattering demonstration of the potential of laser-wakefield acceleration, scientists at the Department of Energy's Lawrence Berkeley National Laboratory, working with colleagues at the University of Oxford, have accelerated electron beams to energies exceeding a billion electron volts (1 GeV) in a distance of just 3.3 centimeters. The researchers report their results in the October issue of Nature Physics.
First quantum teleportation between light and matter
Researchers at the Max Planck Institute of Quantum Optics in Garching and the Niels Bohr Institute in Copenhagen have succeeded in transferring a quantum state of light to a material object - an ensemble of atoms.
New theory explains enhanced superconductivity in nanowires
Superconducting wires are used in magnetic resonance imaging machines, high-speed magnetic-levitation trains, and in sensitive devices that detect variations in the magnetic field of a brain. Eventually, ultra-narrow superconducting wires might be used in power lines designed to carry electrical energy long distances with little loss.
Livermore scientists team with Russia to discover element 118
Scientists from the Chemistry, Materials and Life Sciences Directorate at Lawrence Livermore National Laboratory, in collaboration with researchers from Dubna, the Joint Institute for Nuclear Research (JINR) in Russia, have discovered the newest superheavy element, element 118.
Fermilab discovers exotic relatives of protons & neutrons
Scientists from around the world, participating in the CDF collaboration at the Fermi National Accelerator Laboratory, Fermilab, announced 23rd October the discovery of two rare types of particles, exotic relatives of the much more common proton and neutron.
Cruising the superhighway on a beam of light
The Internet is often called the information superhighway, but the real superhighway is the optical fiber that connects computers around the world at the speed of light, according to John Badding, Penn State associate professor of chemistry.
Learning how nature splits water
About 3.2 billion years ago, primitive bacteria developed a way to harness sunlight to split water molecules into protons, electrons and oxygen, the cornerstone of photosynthesis that led to atmospheric oxygen and more complex forms of life — in other words, the world and life as we know it.
Wireless energy transfer can potentially charge cell phones without cords
Recharging your laptop computer -- and also your cell phone and a variety of other gadgets -- might one day be doable in the same convenient way many people now surf the Web: wirelessly.
X-ray pulse captures image of nanoscale object
Scientists have for the first time used an extremely short and intense X-ray laser pulse to obtain a high-resolution image of a nanoscale object before the laser destroyed the sample.
Ultrasound generates intense mechanoluminiscence
Many people know that if you bite or break a Wint-O-Green Lifesaver in the dark, you will see a spark of green light. That light is called mechanoluminescence, also known as triboluminescence.
World's largest superconducting magnet switches on
The largest superconducting magnet ever built has successfully been powered up to its nominal operating conditions at the first attempt. Called the Barrel Toroid because of its shape, this magnet provides a powerful magnetic field for ATLAS, one of the major particle detectors being prepared to take data at CERN1's Large Hadron Collider (LHC), the new particle accelerator scheduled to turn on in November 2007.
The smell of money
It's not hard to recall the pungent scent of a handful of pocket change. Similar smells emanate from a sweat-covered dumbbell or the water emerging from an old metal pipe. Yet no one has been able to identify the exact chemical cause of these familiar odors.
Magnetic needles turn somersaults
Scientists at the Max Planck Institute of Metals Research in Stuttgart have discovered a new mechanism with which it is possible to use weak magnetic fields to reverse tiny magnetic structures, called vortex cores, quickly and with no losses.
Era of high-speed optical computing is approaching
Physicists at Oregon State University have discovered a way to manipulate the transmission of optical signals in tiny wires, dramatically slowing, stopping or even speeding them up to velocities faster than the speed of light – a major advance that could open the door to a new era of computing and information processing based on optics.
Researchers observe rare light-emitting decay of neutrons
Neutrons -- the tiny particles that match with protons to form the innards of nearly every atom in the universe -- decay when left to fend for themselves outside an atomic nucleus. For decades, researchers have predicted but never proved that roughly 1 in 1,000 of those decays will produce light in the form of an energetic photon.
The mathematics of cloaking
The theorists who first created the mathematics that describe the behavior of the recently announced "invisibility cloak" have revealed a new analysis that may extend the current cloak's powers, enabling it to hide even actively radiating objects like a flashlight or cell phone.