Daily non-political popular news in brief.
New method to directly probe the quantum collisions of individual atoms
04-18-2007 · EurekAlert!A new method has been developed to directly and precisely measure a quantum property of individual atoms -- the phase shifts that result when they collide at ultracold temperatures -- in a way that is independent of the accuracy-limiting density of the atoms. These shifts, which had been impossible to measure with high precision, are important for atomic clocks and other areas of contemporary atomic physics, including research on super-sensitive atom lasers high-temperature superconductivity.
Read more »
Keywords: method, directly, probe, quantum, collisions, individual, atoms, collision, atom
« Previous | Next »
Similar news on "New method to directly probe the quantum collisions of individual atoms":
- IBM and Imago find a crucial difficulty in semiconductor device scaling
09-06-2007 · EurekAlert!
As reported in the Sept. 7, 2007 issue of Science, IBM and Imago used atom probe tomography to observe, for the first time, distributions of individual dopant atoms at defects in semiconductor devices. The researchers found that clusters of dopant atoms form around defects after ion implantation and annealing. These clusters persist even after considerable thermal treatment, creating dopant fluctuations that may ultimately limit the scalability of semiconductor devices.
Similar news · Read more »
- Physicists pin down spin of surface atoms
09-12-2007 · EurekAlert!
UC-Berkeley physicists have successfully measured the atomic spin of an isolated atom, one of the necessary steps on the road to quantum computers and spintronics devices. Using a scanning tunneling microscope with a spin-polarized tip, Michael Crommie and colleagues mapped the surface topography and the surface energy levels to determine the spin of adatoms, the first time this has been measured directly.
Similar news · Read more »
- NIST physicists boost 'entanglement' of atom pairs
10-18-2006 · EurekAlert!
Physicists at NIST have taken a significant step toward transforming entanglement -- an atomic-scale phenomenon described by Albert Einstein as "spooky action at a distance" -- into a practical tool. They demonstrated a method for refining entangled atom pairs, a process called purification, so they can be more useful in quantum computers and communications systems, emerging technologies that exploit the unusual rules of quantum physics for pioneering applications such as "unbreakable" data encryption.
Similar news · Read more »
- Delft University of Technology shines light on atomic transistor
11-22-2006 · EurekAlert!
Researchers from TU Delft and FOM Foundation have successfully measured transport through a single atom in a transistor. This research offers new insights into the behaviour of so-called dopant atoms in silicon. The researchers are able to measure and manipulate a single dopant atom in a realistic semi-conducting environment. The individual behaviour of dopant atoms is a stumbling block to the further miniaturisation of electronics. The work is published in Physical Review Letters.
Similar news · Read more »
- New simulator is next step on the road to developing quantum computers
11-26-2006 · EurekAlert!
Scientists have proven theoretically a novel way to build a simulator that can recreate the way atoms and particles behave in a quantum system, says research published today. The proposed simulator is unique because it could let researchers control how individual particles move and interact with each other. This ability to control individual parts of a quantum system is key to the development of powerful quantum computers in the future.
Similar news · Read more »
- Super-thin membrane, 50 atoms thick, sorts individual molecules
02-14-2007 · EurekAlert!
A newly designed porous membrane, so thin it's invisible edge-on, may revolutionize the way doctors and scientists manipulate objects as small as a molecule. The 50-atom thick filter can withstand surprisingly high pressures and may be a key to better separation of blood proteins for dialysis patients, speeding ion exchange in fuel cells, creating a new environment for growing neurological stem cells, and purifying air and water in hospitals and clean-rooms at the nanoscopic level.
Similar news · Read more »
- Single spinning nuclei in diamond offer a stable quantum computing building block
05-31-2007 · EurekAlert!
Surmounting several distinct hurdles to quantum computing, physicists at Harvard University have found that individual carbon-13 atoms in a diamond lattice can be manipulated with extraordinary precision to create stable quantum mechanical memory and a small quantum processor, also known as a quantum register, operating at room temperature. The finding brings the futuristic technology of quantum information systems into the realm of solid-state materials under ordinary conditions.
Similar news · Read more »
- Atom 'noise' may help design quantum computers
03-02-2007 · EurekAlert!
Physicists at NIST have found that images of noise in clouds of ultracold atoms trapped by lasers reveal hidden structural patterns, including spacing between atoms and cloud size.
Similar news · Read more »
- Nanotube flickering reveals single-molecule rendezvous
06-07-2007 · EurekAlert!
In this week's issue of Science, French and US researchers describe a new technique that allowed them to zoom in and observe quantum quasiparticles called excitons on individual carbon nanotubes. The team, which was led by Rice University chemist Bruce Weisman and University of Bordeaux physicist Laurent Cognet, found that each exciton travels about 90 nanometers and visits around 10,000 carbon atoms during its 100-trillionth-of-a-second lifespan.
Similar news · Read more »
- Delicate relation between single spins
03-02-2007 · EurekAlert!
Probing the magnetic interaction between single atoms is no longer a dream. Using a scanning tunnelling microscope, the interaction of the spins of two neighboring cobalt atoms adsorbed at a copper surface has been measured as a function of their distance with atomic precision. This development opens up new possibilities to probe the quantum nature of magnetic phenomena and to explore the physical limits of magnetic data storage.
Similar news · Read more »
