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quantum mechanics News
QCLs: More Light, Less Heat
EVANSTON, Ill., Jan. 12, 2010 – Northwestern University researchers developed compact, mid-infrared laser diodes that generate more light than heat – a breakthrough in quantum cascade laser (QCL) efficiency and an important step toward use of QCLs in a variety of applications, including remote sensing of hazardous chemicals.
Quantum Entanglement
PASADENA, Calif., Dec. 23, 2009 – A new paradigm that should allow scientists to observe quantum behavior in small mechanical systems has been realized by researchers at California Institute of Technology (Caltech). Their ideas offer a new means of addressing one of the most...
“Photonic machine gun” fires up supercomputer research
LONDON – The entanglement of photons is key to developing quantum computers and cryptography devices. However, understanding exactly what entanglement means is tricky, as is generating entangled photons at defined points in time. Researchers at Imperial...
Atom Imaged in Ultracold Gas
CAMBRIDGE, Mass., Nov. 5, 2009 – A high-resolution microscope was developed to image individual atoms in an ultracold quantum gas, marking the first time scientists detected single atoms in a crystalline structure made solely of light called a Bose Hubbard optical lattice.
Quantum Signatures of Chaos
TUCSON, Ariz., Oct. 9, 2009 – No one has produced experimental evidence that chaos occurs in the quantum world – the world of photons, atoms, molecules and their building blocks – until now. In a series of experiments, professor Poul Jessen and a group at the University of...
Seeing Inside a Living Cell
CAMBRIDGE, Mass., Oct. 8, 2009 – Electron microscopes are the most powerful type of microscope, capable of distinguishing even individual atoms. However, these microscopes cannot be used to image living cells because the electrons destroy the samples. Now, MIT assistant...
Alice and Bob talk quantum encryptedly across Vienna
VIENNA, Austria – Researchers from all across Europe have set up a quantum key distribution (QKD) system that demonstrates the growing capabilities of this technology at the network level. Forty-one research and industrial organizations from the European Union,...
Science Medalists Named
WASHINGTON, Sept. 29, 2009 – Pioneers in the fields of astronomical telescope building, computer simulation, and medical imaging were chosen to receive the National Medal of Science, the highest honor bestowed by the US government on scientists, engineers and inventors.
Detecting Entangled Photons
PASADENA, Calif., May 13, 2009 – Entanglement, in the form of beams of light simultaneously propagating along four distinct paths, can be detected with a surprisingly small number of measurements, according to scientists at Caltech. The group has developed a method to detect...
Incandescent Nanotube Lamp
LOS ANGELES, Calif., May 7, 2009 – In an effort to explore the boundary between thermodynamics and quantum mechanics – two fundamental, yet seemingly incompatible theories of physics – a team from the UCLA Department of Physics and Astronomy has created the world's smallest...
The Universe Used as a Lens
CHICAGO, Feb. 25, 2009 – Scientists are harnessing the cosmos as a scientific “instrument” in their quest to determine the makeup of the universe. The University of Chicago’s Evalyn Gates calls the instrument “Einstein’s telescope.” The instrument is actually the...
Lasers Measure 1-Neutron Halo
MAINZ, Germany, Feb. 20, 2009 – Using lasers, scientists in Germany have precisely measured the single-neutron halo of the isotope beryllium-11 for the first time, work that may help them gain a better understanding of the forces within the atomic nucleus that bind atoms together....
Lasers Tune Quantum Dots
GAITHERSBURG, Md., Aug. 20, 2008 – In what could be a key development in cryptography applications, researchers from the National Institute of Standards and Technology (NIST) and the Joint Quantum Institute (JQI), a collaborative center of the University of Maryland and NIST, have...
Harmonic Oscillators
SANTA BARBARA, Calif., Aug. 5, 2008 – University of California, Santa Barbara (UCSB) researchers have made a major breakthrough in experimental quantum mechanics. UCSB physicists Max Hofheinz, John Martinis and Andrew Cleland have documented how they used a superconducting electronic...
Hybrid Atom Identified
WEST LAFAYETTE, Ind., June 27, 2008 -- Experiments with nanoscale transistors by an international team have led to the identification of a hybrid atom that is half natural, half man-made and could be used to develop quantum computers. "Up to now large-scale quantum computing has been...
Computers Use Quantum Photonics
STANFORD, Calif., May 19, 2008 -- What was once considered more theoretical than practical, computers based on the powerful properties of quantum mechanics now have the potential to revolutionize information technology and security. Engineers and physicists from Stanford and the...
Light Manipulation Improved
BATH, England, Nov. 16, 2007 -- A special hollow-core photonic crystal fiber has been used to manipulate light a million times more efficiently than ever before. The research by a team at the University of Bath, England, led by Fetah Benabid said the work has opened the door...
Unruly Light Waves Tamed
ATLANTA, Oct. 9, 2007 -- Light waves become unstable and unruly as they are pressed through surfaces only a few nanometers apart and smaller than their wavelength, because there just isn't enough room for them to travel in a straight line. This makes the creation of...
All Aboard the Quantum 'Bus'
NEW HAVEN, Conn., and GAITHERSBURG, Md., Sept. 27, 2007 -- Two research groups have independently demonstrated a superconducting quantum 'bus,' using it both to store and transfer information between independent quantum bits (qubits) and as a way to enable the interaction of two qubits, creating a combined...
'Large' Object Laser-Cooled Near Absolute Zero
CAMBRIDGE, Mass., April 6, 2007 -- A coin-sized object has been cooled to within one degree of absolute zero through a laser-cooling technique that could one day allow scientists to observe quantum behavior in "large" objects. The study marks the coldest temperature ever reached...
Image Stored on One Photon
ROCHESTER, N.Y., Jan, 22, 2007 -- Researchers have made an optics breakthrough that allows them to encode an entire image's worth of data into a photon, slow the image down for storage, and then retrieve the image intact. While the initial test image consists of only a few...
Fastest Molecules Ever Boost Optical Technologies
PULLMAN, Wash., Jan. 3, 2007 -- The Internet could soon shift into overdrive thanks to a new generation of optical molecules developed and tested by an international team of researchers. The new materials, organic molecules known as chromophores, interact 50 percent more...
Physicists Get a Grip on a Single Electron's Spin
DELFT, Netherlands, Aug. 28, 2006 -- For the first time, researchers said they have succeeded in controlling the spin of a single electron in a nanostructure. The achievement is a step toward using the electron's spin as a quantum bit, the basis for constructing a still-theoretical...
Physicist's Quantum Mechanics, Gravity Research Gets Grant
Aug 3, 2006 — Massachusetts Institute of Technology physics professor Xiao-Gang Wen has received a grant from the Foundational Questions Institute (FQXi) to fund his study of the relationship between quantum mechanics and gravity. Wen is one of 30 researchers to...
Photon-Number-Resolving Sensor Displays High Efficiency
Jul 1, 2005 — A quantum calorimetric sensor developed at the National Institute of Standards and Technology in Boulder, Colo., displays photon-number-resolving operation at 1550 nm with an efficiency of 88.6 percent. The scientists behind the work suggest that...
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May 2024
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