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Results 21 - 38 of 38.
Taking the "Random" out of a Random Laser
Random Lasers are tiny structures emitting light irregularly into different directions. Scientists at the Vienna University of Technology have now shown that these exotic light sources can be accurately controlled. The light they emit is as unique as a fingerprint: random lasers are tiny devices with a light emission pattern governed by random scattering of light.
Random Lasers are tiny structures emitting light irregularly into different directions. Scientists at the Vienna University of Technology have now shown that these exotic light sources can be accurately controlled. The light they emit is as unique as a fingerprint: random lasers are tiny devices with a light emission pattern governed by random scattering of light.
A team of quantum physicists in Innsbruck led by Christian Roos and Cornelius Hempel have realised an extremely sensitive method for the spectroscopy of atomic and molecular atoms. This technique can be used to closely study a number of particles. The scientists have published their findings Photonics.
Heat Radiation of Small Objects: Beyond Planck’s Equations
Objects that are smaller than the wavelength of thermal radiation cannot radiate heat efficiently. A generalized theory of thermal radiation has now been experimentally confirmed at the level of a single object at the Vienna University of Technology. All the objects around us emit thermal radiation.
Objects that are smaller than the wavelength of thermal radiation cannot radiate heat efficiently. A generalized theory of thermal radiation has now been experimentally confirmed at the level of a single object at the Vienna University of Technology. All the objects around us emit thermal radiation.
Improving Measurements by Reducing Quantum Noise
Researchers from Vienna University of Technology have built a new interferometer for trapped, ultracold atomic gases. By strongly suppressing the quantum noise, which ultimately limits the performance of interferometers, they were able to curb the effect of atomic interactions, and increase the interrogation time of their interferometer.
Researchers from Vienna University of Technology have built a new interferometer for trapped, ultracold atomic gases. By strongly suppressing the quantum noise, which ultimately limits the performance of interferometers, they were able to curb the effect of atomic interactions, and increase the interrogation time of their interferometer.
The quantum physicists in Innsbruck welcome an addition to their team: Gerhard Kirchmair - a young aspiring physicist who brings a new technology to the Tyrol. The young scientist will investigate quantum mechanical phenomena by using superconducting circuits to build hybrid architectures for quantum information processing.
Data Highways for Quantum Information
Researchers at the Vienna University of Technology quantum mechanically couple atoms to glass fiber cables. Now, they have shown that their technique enables storage of quantum information over a sufficiently long period of time to realize global quantum networks based on optical fibers. Researchers at the Vienna University of Technology quantum mechanically couple atoms to glass fiber cables.
Researchers at the Vienna University of Technology quantum mechanically couple atoms to glass fiber cables. Now, they have shown that their technique enables storage of quantum information over a sufficiently long period of time to realize global quantum networks based on optical fibers. Researchers at the Vienna University of Technology quantum mechanically couple atoms to glass fiber cables.
The Dance of the Atoms
Catalysts can stop working when atoms on the surface start moving. At the Vienna University of Technology, this dance of the atoms could now be observed and explained. Lone people standing in a ballroom don't tend to move a lot. It's only when they find a suitable dance partner that rapid motion sets in.
Catalysts can stop working when atoms on the surface start moving. At the Vienna University of Technology, this dance of the atoms could now be observed and explained. Lone people standing in a ballroom don't tend to move a lot. It's only when they find a suitable dance partner that rapid motion sets in.
Helicopter-light-beams - a new tool for quantum optics
A light wave oscillates perpendicular to its propagation direction - that is what students learn in school. However, scientists of the Vienna University of Technology (TU Vienna) now perform atom-physics experiments with light oscillating in the longitudinal direction. Storing light in a bottle is easier than one might think: Laser light can be coupled into an optical glass fiber in such a way that it does not travel along the fiber but rather spirals around it in a bulged, bottle-like section.
A light wave oscillates perpendicular to its propagation direction - that is what students learn in school. However, scientists of the Vienna University of Technology (TU Vienna) now perform atom-physics experiments with light oscillating in the longitudinal direction. Storing light in a bottle is easier than one might think: Laser light can be coupled into an optical glass fiber in such a way that it does not travel along the fiber but rather spirals around it in a bulged, bottle-like section.
Innsbruck physicists led by Rainer Blatt and Peter Zoller experimentally gained a deep insight into the nature of quantum mechanical phase transitions. They are the first scientists that simulated the competition between two rival dynamical processes at a novel type of transition between two quantum mechanical orders.
Signaling cascades communicate and integrate extracellular signaling cues spatially and temporally via formation of defined protein-protein interactions. Scientists from the Institute of Biochemistry in Innsbruck discovered a unique mechanism which is based on binary protein-protein interactions and which explains cross talk between critically regulated signaling cascades.
Ninety-nine percent of all of Earth's land ice is locked up in the massive Greenland and Antarctic ice sheets. However, over the period 2003 to 2009, the melting of the world's other land ice stored in glaciers contributed just as much to sea level rise as the two ice sheets combined. This is the result of a new study led by Alex Gardner from Clark University (USA), which has been published in the current issue of the journal Science.
Second sound is a quantum mechanical phenomenon, which has been observed only in superfluid helium. Physicists from the University of Innsbruck, Austria, in collaboration with colleagues from the University of Trento and the National Research Council of Italy, have now proven the propagation of such a temperature wave in a quantum gas.
The Bee’s Knees for Detecting Disease
Fire blight is a serious threat to fruit trees. Now a quick test has been developed at the Vienna University of Technology, which can indicate the danger early - with the help of bees. When blossoms and leaves wilt and turn black, it is usually too late: the plant disease fire blight damages especially apple trees and pear trees, clearing the affected trees is often the only chance left.
Fire blight is a serious threat to fruit trees. Now a quick test has been developed at the Vienna University of Technology, which can indicate the danger early - with the help of bees. When blossoms and leaves wilt and turn black, it is usually too late: the plant disease fire blight damages especially apple trees and pear trees, clearing the affected trees is often the only chance left.
Expressing Infinity in Finite Sentences
A sponsorship by the Vienna Science and Technology Fund (WWTF) has enabled a new research group to be established at the Technical University of Vienna: Stefan Hetzl wants to link mathematical proof theory and language theory together. Infinitely many numbers, infinitely large quantities, infinitely many steps: In mathematics, one has to deal a lot with infinity.
A sponsorship by the Vienna Science and Technology Fund (WWTF) has enabled a new research group to be established at the Technical University of Vienna: Stefan Hetzl wants to link mathematical proof theory and language theory together. Infinitely many numbers, infinitely large quantities, infinitely many steps: In mathematics, one has to deal a lot with infinity.
Aircraft Sensors without Batteries or Cables
An idea from EADS and Vienna University of Technology is taking off: in a joint project, Energy Harvester Modules suitable for aircrafts have been tested, which should supply sensor nodes with electrical power in the future. Like a nervous system in a human body, sensor networks attached to the aircraft fuselage will in future record and transmit essential data concerning the structural health of the aircraft.
An idea from EADS and Vienna University of Technology is taking off: in a joint project, Energy Harvester Modules suitable for aircrafts have been tested, which should supply sensor nodes with electrical power in the future. Like a nervous system in a human body, sensor networks attached to the aircraft fuselage will in future record and transmit essential data concerning the structural health of the aircraft.
A team of physicists at the University of Innsbruck, Austria, performed an experiment that seems to contradict the foundations of quantum theory - at first glance. The team led by Rainer Blatt reversed a quantum measurement in a prototype quantum information processor. The experiment is enabled by a technique that has been developed for quantum error correction in a future quantum computer.
New Material Promises Better Solar Cells
Researchers at the Vienna University of Technology show that a recently discovered class of materials can be used to create a new kind of solar cell. Single atomic layers are combined to create novel materials with completely new properties. Layered oxide heterostructures are a new class of materials, which has attracted a great deal of attention among materials scientists in the last few years.
Researchers at the Vienna University of Technology show that a recently discovered class of materials can be used to create a new kind of solar cell. Single atomic layers are combined to create novel materials with completely new properties. Layered oxide heterostructures are a new class of materials, which has attracted a great deal of attention among materials scientists in the last few years.
Not only do optical fibers transmit information every day around the world at the speed of light, but they can also be harnessed for the transport of quantum information. In the current , a research team of Innsbruck physicists led by Rainer Blatt and Tracy Northup report how they have directly transferred the quantum information stored in an atom onto a particle of light.
