Text-size: 

ScienceDaily: Quantum Physics News


home Physics Directory           Link Details
Membership Status of Submitter
Registration Date: Jul 07, 2009
Usergroup: Administrator
Links Submitted: 1705 links
Total Comments: 11 (0 per day)
Total Time Online: 45 days, 22 hours and 10 minutes
Last seen: 07/07/09 - 10:34:13
Biographical Information
Homepage: http://www.tardyon.de/
Occupation: electronic engineer
Birthdate: March 14, 1967 (47 years old)
Interests: Physics, Evolution, Art,
Contact Information
Guestbook: View or sign guestbook (4)
Submission History
Most recent links:
Albert Einstein Home Page
spectrum of physics - directory
Introduction to Black Holes
Physics Concepts, Websites and Science Projects
Glossary of Physics Terms

Find all links submitted by admin
ScienceDaily: Quantum Physics News    
Captured by webthumbnail.org

Category: physics news

URL: http://www.sciencedaily.com/news/matter_energy/quantum_physics/

Description: News on quantum physics. Read current research on everything from quantum mechanics to quantum dots. Was Albert Einstein right?

Submitted: 08/28/10 by admin

PageRank: 7     PageRank 7

Bookmark and Share












Alexa Information:
(Daily reach per million)

Alexa information




Feed Data of

ScienceDaily: Quantum Physics News


Quantum computing? Progress in the fight against quantum dissipation
by on Wed, 16 Apr 2014 13:34:12 EDT:
Scientists have confirmed a 50-year-old, previously untested theoretical prediction in physics and improved the energy storage time of a quantum switch by several orders of magnitude. High-quality quantum switches are essential for the development of quantum computers and the quantum internet -- innovations that would offer vastly greater information processing power and speed than classical (digital) computers, as well as more secure information transmission.
Searching for dark energy with neutrons: With neutrons, scientists can now look for dark energy in the lab
by on Wed, 16 Apr 2014 13:33:34 EDT:
It does not always take a huge accelerator to do particle physics: First results from a low energy, table top alternative takes validity of Newtonian gravity down by five orders of magnitude and narrows the potential properties of the forces and particles that may exist beyond it by more than one hundred thousand times. Gravity resonance spectroscopy is so sensitive that it can now be used to search for Dark Matter and Dark Energy.
House windows that double as solar panels? Shiny quantum dots brighten future of solar cells
by on Mon, 14 Apr 2014 12:38:20 EDT:
A house window that doubles as a solar panel could be on the horizon, thanks to recent quantum-dot work. Scientists have demonstrated that superior light-emitting properties of quantum dots can be applied in solar energy by helping more efficiently harvest sunlight.
Novel technique opens door to better solar cells, superconductors and hard drives
by on Mon, 14 Apr 2014 09:19:58 EDT:
A new invention solves long-standing mystery in the physics of condensed matter and enhances our understanding of interfaces between materials.
New form of matter: Exotic hadron with two quarks, two anti-quarks confirmed
by on Fri, 11 Apr 2014 09:19:47 EDT:
Physicists have confirmed the existence of exotic hadrons -- a type of matter that cannot be classified within the traditional quark model. "We've confirmed the unambiguous observation of a very exotic state -- something that looks like a particle composed of two quarks and two anti-quarks," said one of the scientists. "The discovery certainly doesn't fit the traditional quark model. It may give us a new way of looking at strong-interaction physics."
Search for elusive dark matter: Looking for traces by studying particles with low masses and interaction rates
by on Fri, 11 Apr 2014 09:19:45 EDT:
The ongoing search for invisible dark matter is a subject of great interest to physicists. Although dark matter has never been seen directly, it is thought to be six times more prevalent in the universe than normal matter.
Researchers bolster development of programmable quantum computers
by on Thu, 10 Apr 2014 13:12:19 EDT:
Scientists have performed a proof-of-concept experiment that will aid the future development of programmable quantum computers. In a new study, the researchers describe an experiment that was performed on a crystal containing trillions, rather than hundreds, of quantum mechanical spins, which replicates some of the features of the current generation of much smaller, specialized computers.
Magnetization can surf on the top of a laser-induced sound wave
by on Thu, 10 Apr 2014 08:34:10 EDT:
An effective coupling between magnetism and light can be mediated by sound. This newly discovered phenomenon could be important for recording data on a magnetic device with the help of light.
Emerging research suggests a new paradigm for 'unconventional superconductors'
by on Wed, 09 Apr 2014 20:45:21 EDT:
Scientists have reported the first experimental observation of the quantum critical point in the extensively studied 'unconventional superconductor' TiSe2, finding that it does not reside as predicted within the superconducting dome of the phase diagram, but rather at a full GPa higher in pressure.
One kind of supersymmetry shown to emerge naturally: Unique phenomenon in condensed matter system
by on Wed, 09 Apr 2014 15:57:48 EDT:
Physicists show that a topological superconductor is conducive to displaying phenomena of emergent supersymmetry. Sought after in the realm of subatomic particles by physicists for several decades, supersymmetry describes a unique relationship between particles.
Scalable, universal quantum computer? Quantum information processed with system comprising optical photon and trapped atom
by on Wed, 09 Apr 2014 15:57:28 EDT:
When it comes to recognizing complex patterns or to decoding encrypted messages, conventional computers reach their limits. A whole new quality in the communication and processing of data is expected from a technology that exploits the special properties of quantum particles such as superposition and entanglement. Scientists are pursuing a variety of different concepts towards the development of such a quantum computer. One professor follows the strategy of combining two rather dissimilar techniques: quantum communication using photons, and information processing using stationary atoms. His team has now for the first time realized a quantum logic gate between a single photon and a single atom.
New 'switch' could power quantum computing: Light lattice traps atoms, builds networks of quantum information transmitters
by on Wed, 09 Apr 2014 13:47:34 EDT:
Using a laser to place individual rubidium atoms near the surface of a lattice of light, scientists have developed a new method for connecting particles -- one that could help in the development of powerful quantum computing systems. The new technique allows researchers to couple a lone atom of rubidium, a metal, with a single photon, or light particle.
Novel ultra-fast electrical circuits use light-generated tunneling currents
by on Wed, 09 Apr 2014 09:36:13 EDT:
Scientists have successfully designed and fabricated electrical circuits that can operate at hundreds of terahertz frequencies, which is tens of thousands times faster than today’s state-of-the-art microprocessors.
Tracking the transition of early-universe quark soup to matter-as-we-know-it
by on Fri, 04 Apr 2014 13:58:56 EDT:
By smashing together ordinary atomic nuclei at the Relativistic Heavy Ion Collider, scientists recreate the primordial soup of the early universe thousands of times per second. Using sophisticated detectors to track what happens as exotic particles emerge from the collision zone and “freeze out” into more familiar forms of matter, they are turning up interesting details about how the transition takes place.
Light-guiding gels provide new avenues for drug detection, delivery
by on Fri, 04 Apr 2014 08:54:21 EDT:
With the ability to deliver light inside the body in a predictable manner and to host a variety of genetically engineered cells, hydrogels may help address current challenges with applying optogenetic approaches in clinical care. Optogenetics is a relatively new technique that harnesses light to activate or inhibit light-responsive proteins that control specific cell functions.
Quantum computing: Quantum photon properties revealed in another particle -- the plasmon
by on Thu, 03 Apr 2014 21:26:11 EDT:
One approach to make qubits for quantum computing relies on the creation of two single photons that interfere with one another in a device called a waveguide. Results from a recent applied science study support the idea that waveguides coupled with another quantum particle -- the surface plasmon -- could also become an important piece of the quantum computing puzzle.
Quantum cryptography for mobile phones
by on Thu, 03 Apr 2014 13:23:31 EDT:
An ultra-high security scheme that could one day get quantum cryptography using Quantum Key Distribution into mobile devices has been developed and demonstrated. Secure mobile communications underpin our society and through mobile phones, tablets and laptops we have become online consumers. The security of mobile transactions is obscure to most people but is absolutely essential if we are to stay protected from malicious online attacks, fraud and theft.
Fermi data tantalize with new clues to dark matter: Gamma rays from center of Milky Way galaxy
by on Thu, 03 Apr 2014 12:36:28 EDT:
A new study of gamma-ray light from the center of our galaxy makes the strongest case to date that some of this emission may arise from dark matter, an unknown substance making up most of the material universe. Using publicly available data from NASA's Fermi Gamma-ray Space Telescope, independent scientists at the Fermi National Accelerator Laboratory (Fermilab), the Harvard-Smithsonian Center for Astrophysics (CfA), the Massachusetts Institute of Technology (MIT) and the University of Chicago have developed new maps showing that the galactic center produces more high-energy gamma rays than can be explained by known sources and that this excess emission is consistent with some forms of dark matter.
New insights into quantum dynamics and quantum chaos
by on Wed, 02 Apr 2014 15:36:21 EDT:
A team of researchers has announced analytical prediction and numerical verification of novel quantum rotor states in nanostructured superconductors.
Electrical transmission at atomic level: New approach to building signal processing components from individual atoms
by on Tue, 01 Apr 2014 10:23:44 EDT:
In a study on the transport of atoms in ultracold gases, a team of physicists has developed a new approach to how signals might be transmitted at the atomic level. This could be especially important for realizing logic structures with strictly defined functions on the basis of individual atoms, which in turn could find application in transistors or diodes.
Physicists split and collide ultracold atom clouds using steerable 'optical tweezers'
by on Mon, 31 Mar 2014 11:42:31 EDT:
Physicists have pushed the frontiers of quantum technology by developing a steerable 'optical tweezers' unit that uses intense laser beams to precisely split minute clouds of ultracold atoms and to smash them together. The researchers' feat is set to enhance efforts to understand the mysterious ways that atoms interact at temperatures of less than a millionth of a degree above absolute zero.
Ultra-thin light detectors: Metamaterials and quantum cascade structures combined for first time
by on Thu, 27 Mar 2014 10:06:16 EDT:
A new, extremely thin kind of light detectors has been developed. Two very different technologies were combined for the first time: metamaterials and quantum cascade structures. Subtle interactions of electrons and light make them so valuable for technology: ultra-thin systems of semiconductor layers can turn electrical voltage into light. But they can also be used the other way around and serve as light detectors.
Record quantum entanglement of multiple dimensions: Two Schrödinger cats which could be alive, dead, or in 101 other states simultaneously
by on Thu, 27 Mar 2014 10:06:12 EDT:
Scienitists have managed to create an entanglement of 103 dimensions with only two photons. The record had been established at 11 dimensions. The discovery could represent a great advance toward the construction of quantum computers with much higher processing speeds than current ones, and toward a better encryption of information.
Strange materials cropping up in condensed matter laboratories
by on Tue, 25 Mar 2014 09:42:23 EDT:
Physicists are using surprising ideas and mathematical tools originating in string theory to guide research into strange materials that are cropping up in condensed matter laboratories. There are a handful of systems that cannot be described by considering electrons (or any other kind of quasi-particle) moving around.
Einstein's 'spooky' theory may lead to ultra-secure Internet
by on Mon, 24 Mar 2014 22:45:54 EDT:
Einstein's skepticism about quantum mechanics may lead to an ultra-secure Internet, a new paper suggests. In 1935, Einstein and researchers highlighted a 'spooky' theory in quantum mechanics, which is the strange way entangled particles stay connected even when separated by large distances. In the new research, the authors show that entangled messages "can be shared between more than two people and may provide unprecedented security for a future quantum Internet."
Kelvin wave seen on quantum 'tornado' for first time
by on Mon, 24 Mar 2014 15:40:15 EDT:
A spinning tornado of very cold liquid helium obeys the laws of quantum mechanics. Sometimes, two quantum tornadoes flex into curved lines, cross over and form an X, swap ends, and then retract -- a process called reconnection. For the first time, researchers provide visual evidence that the reconnection of quantum vortexes launches Kelvin waves to quickly relax the system. Understanding turbulence in quantum fluids may offer clues to neutron stars, trapped atom systems and superconductors.
Hunt for an unidentified electron object
by on Mon, 24 Mar 2014 15:40:11 EDT:
New research sheds light on the nature of 'unidentified electron objects' -- a mysterious class of objects that exists in superfluid helium at low temperature. Researchers have developed a new mathematical framework capable of describing motions in superfluids -- low temperature fluids that exhibit classical as well as quantum behavior.
Plugging the hole in Hawking's black hole theory
by on Mon, 24 Mar 2014 14:54:07 EDT:
Recently physicists have been poking holes again in Stephen Hawking's black hole theory -- including Hawking himself. Now another professor has jumped into the fray. He believes he has solved the decades-old information paradox debate in a groundbreaking new study.
Experiment opens the door to multi-party quantum communication
by on Sun, 23 Mar 2014 18:44:08 EDT:
In the world of quantum science, Alice and Bob have been talking to one another for years. Charlie joined the conversation a few years ago, but now with spacelike separation, scientists have measured that their communication occurs faster than the speed of light. For the first time, physicists have demonstrated the distribution of three entangled photons at three different locations (Alice, Bob and Charlie) several hundreds of meters apart, proving quantum nonlocality for more than two entangled photons.
Engineers design 'living materials': Hybrid materials combine bacterial cells with nonliving elements that emit light
by on Sun, 23 Mar 2014 15:21:44 EDT:
Inspired by natural materials such as bone -- a matrix of minerals and other substances, including living cells -- engineers have coaxed bacterial cells to produce biofilms that can incorporate nonliving materials, such as gold nanoparticles and quantum dots. These "living materials" combine the advantages of live cells, which respond to their environment, produce complex biological molecules, and span multiple length scales, with the benefits of nonliving materials, which add functions such as conducting electricity or emitting light.
Unavoidable disorder used to build nanolaser
by on Sun, 23 Mar 2014 15:21:40 EDT:
World around researchers are working to develop nano-optical chips, where light can be controlled. These could be used for future circuits based on light (photons) instead of electrons -- that is photonics instead of electronics. But it has proved to be impossible to achieve perfect photonic nanostructures. Now researchers have shown that imperfect optical chips can be used to produce 'nanolasers', which is an ultimately compact and energy-efficient light source.
Now even more likely that there are particles smaller than Higgs out there
by on Fri, 21 Mar 2014 09:53:31 EDT:
Nobody has seen them yet; particles that are smaller than the Higgs particle. However theories predict their existence, and now the most important of these theories have been critically tested. The result: The existence of the yet unseen particles is now more likely than ever.
New control over topological insulator
by on Thu, 20 Mar 2014 10:11:36 EDT:
Scientists investigating the electronic properties of ultra-thin films of new materials -- topological insulators (TIs) -- have demonstrated a new method to tune their unique properties using strain. Topological insulators are new materials with surfaces that host a new quantum state of matter and are insensitive to contaminants, defects and impurities. Surface electrons in TIs behave like massless Dirac particles in a similar way to electrons in graphene. Moreover, surface currents in topological insulators also preserve their spin orientation and coherence on a macro scale.
Best value for top quark's mass: Tevatron and LHC scientists announces first joint result
by on Wed, 19 Mar 2014 11:53:07 EDT:
Scientists working on the world's leading particle collider experiments have joined forces, combined their data and produced the first joint result from Fermilab's Tevatron and CERN's Large Hadron Collider (LHC), past and current holders of the record for most powerful particle collider on Earth. Scientists from the four experiments involved -- ATLAS, CDF, CMS and DZero -- announced their joint findings on the mass of the top quark today at the Rencontres de Moriond international physics conference in Italy.
Thermal conductance can be controlled like waves using nanostructures
by on Wed, 19 Mar 2014 10:34:28 EDT:
Thermal conduction is a familiar everyday phenomenon. In a hot sauna, for instance, you can sit comfortably on a wooden bench that has a temperature of 100C (212F), but if you touch a metallic nail with the same temperature, you will hurt yourself. The difference of these two experiences is due to the fact that some materials, such as metals, conduct heat well, whereas some other materials, such as wood, do not. It is therefore commonly thought that thermal conductance is simply a materials parameter. Now, researchers have demonstrated for the first time that it is possible to change the thermal conductance of a material by tuning the wave-like properties of heat flow, by orders of magnitude, using nanostructuring.
NIST chips help BICEP2 telescope find direct evidence of origin of the universe
by on Tue, 18 Mar 2014 15:49:36 EDT:
The BICEP2 tlescope camera that produced the data behind the announcement of the first direct evidence of the rapid inflation of the universe at the dawn of time relies in part on the extraordinary signal amplification made possible by NIST's superconducting quantum interference devices.
New window into quantum physics opened with superconductivity in LEDs
by on Tue, 18 Mar 2014 14:05:37 EDT:
Physicists hae proposed a novel and efficient way to leverage the strange quantum physics phenomenon known as entanglement. The approach would involve combining light-emitting diodes with a superconductor to generate entangled photons and could open up a rich spectrum of new physics as well as devices for quantum technologies, including quantum computers and quantum communication.
Innovative quantum computer under scrutiny
by on Tue, 18 Mar 2014 11:38:27 EDT:
A new and innovative computing machine is currently attracting a great deal of attention in specialist circles. A research team has now confirmed that the machine uses quantum effects. However, it is not any faster than a traditional computer.
Tremors of the Big Bang: First direct evidence of cosmic inflation
by on Mon, 17 Mar 2014 12:58:50 EDT:
Almost 14 billion years ago, the universe we inhabit burst into existence in an extraordinary event that initiated the Big Bang. In the first fleeting fraction of a second, the universe expanded exponentially, stretching far beyond the view of our best telescopes. All this, of course, was just theory. Researchers now announce the first direct evidence for this cosmic inflation. Their data also represent the first images of gravitational waves, or ripples in space-time. These waves have been described as the "first tremors of the Big Bang." Finally, the data confirm a deep connection between quantum mechanics and general relativity.
A brake for spinning molecules: Precise control of rotational temperature of molecular ions for lab-based astrochemistry
by on Thu, 13 Mar 2014 10:17:02 EDT:
Chemical reactions taking place in outer space can now be more easily studied on Earth. Scientists discovered an efficient and versatile way of braking the rotation of molecular ions. The spinning speed of these ions is related to a rotational temperature. Using an extremely tenuous, cooled gas, the researchers have lowered this temperature to about -265 °C. From this record-low value, the researchers could vary the temperature up to -210 °C in a controlled manner.
'Ultracold' molecules promising for quantum computing, simulation
by on Wed, 12 Mar 2014 15:02:33 EDT:
Researchers have created a new type of 'ultracold' molecule, using lasers to cool atoms nearly to absolute zero and then gluing them together, a technology that might be applied to quantum computing, precise sensors and advanced simulations.
Quantum chaos in ultracold gas discovered
by on Wed, 12 Mar 2014 15:01:14 EDT:
Researchers have discovered that even simple systems, such as neutral atoms, can possess chaotic behavior, which can be revealed using the tools of quantum mechanics. The ground-breaking research opens up new avenues to observe the interaction between quantum particles.   
Colloidal silicon quantum dots: Synthesis and luminescence tuning from the near-UV to the near-IR range
by on Wed, 12 Mar 2014 10:30:42 EDT:
Scientists summarize the peculiarities of high-quantum yield silicon nanoparticles focusing on their emission, which depends on the preparation method and surface chemistry.
Quantum physics secures new cryptography scheme
by on Wed, 12 Mar 2014 08:25:28 EDT:
The way we secure digital transactions could soon change. An international team has demonstrated a form of quantum cryptography that can protect people doing business with others they may not know or trust -- a situation encountered often on the Internet and in everyday life -- for example, at a bank's ATM.
Acoustic cloaking device hides objects from sound
by on Tue, 11 Mar 2014 18:47:08 EDT:
Engineers have demonstrated the world's first three-dimensional acoustic cloak. The new device reroutes sound waves to create the impression that the cloak and anything beneath it are not there. The phenomenon works in all three dimensions, no matter which direction the sound is coming from or where the observer is located, and holds potential for future applications such as sonar avoidance and architectural acoustics.
Possible evidence for dark matter particle presented at UCLA physics symposium
by on Mon, 10 Mar 2014 21:23:16 EDT:
Dark matter, the mysterious substance estimated to make up approximately more than one-quarter of the mass of the universe, is crucial to the formation of galaxies, stars and even life but has so far eluded direct observation. At a recent UCLA symposium attended by 190 scientists from around the world, physicists presented several analyses that participants interpreted to imply the existence of a dark matter particle. The likely mass would be approximately 30 billion electron-volts, said the symposium's organizer.
Extraordinary momentum and spin discovered in evanescent light waves
by on Thu, 06 Mar 2014 09:37:54 EST:
Researchers have identified unexpected dynamic properties of a type of light wave called evanescent waves. These surprising findings contrast sharply with previous knowledge about light and photons.
Ultra sensitive detection of radio waves with lasers
by on Wed, 05 Mar 2014 13:23:55 EST:
Radio waves are used for many measurements and applications, for example, in communication with mobile phones, MRI scans, scientific experiments and cosmic observations. But 'noise' in the detector of the measuring instrument limits how sensitive and precise the measurements can be. Now researchers have developed a new method where they can avoid noise by means of laser light and can therefore achieve extreme precision of measurements.
Seeking quantum-ness: D-Wave chip passes rigorous tests
by on Wed, 05 Mar 2014 12:53:05 EST:
D-Wave quantum processor passes tests indicating that it uses special laws of quantum mechanics to operate. A key task for researchers has been to determine whether D-Wave processors operate as hoped -- using the special laws of quantum mechanics to offer potentially higher-speed processing, instead of operating in a classical, traditional way.
Novel quantum dot laser paves the way for lower-cost photonics
by on Tue, 04 Mar 2014 13:00:31 EST:
With the explosive growth of bandwidth demand in telecommunications networks, experts are continually seeking new ways to transmit increasingly large amounts of data in the quickest and cheapest ways possible. Photonic devices -- which convert light to electricity and vice versa -- offer an energy-efficient alternative to traditional copper network links for information transmission. Unfortunately, these devices are also almost always prohibitively pricey.
Physics in 3-D? That's nothing: Try 0-D
by on Tue, 04 Mar 2014 12:58:48 EST:
Zero-dimensional quantum dots could someday have a big effect on a variety of technologies, such as solar energy, lasers and medical diagnostics. This latest discovery is all about going small, but its significance is anything but. The research team's ability to control the confinement energy by varying the size of the quantum dot opens up a world of possibilities.
Boron, discovered in 1808, gets a nano refresh
by on Tue, 04 Mar 2014 12:55:00 EST:
Nanotechnology -- the control of matter at the nanoscale, at dimensions of approximately 1 and 100 nanometers -- is revolutionizing the materials and devices used in many applications and products. A newly discovered two-dimensional boron structure possesses properties superior to those of graphene.
Researchers propose a new way to detect the elusive graviton
by on Tue, 04 Mar 2014 11:35:15 EST:
A cosmologist and a physicist have proposed that measuring minute changes in the cosmic background radiation of the universe could be a pathway of detecting the telltale effects of gravitons.
Quantum effects: Patterns of interfering massive particles
by on Tue, 04 Mar 2014 07:12:10 EST:
A new study examines the nature of exchange interactions between identical particles, which only occur at the quantum level. Two-particle interference has been the focus of many studies, specifically in quantum optics with photons. However, interference between two massive, identical particles is not so well understood. Scientists have now uncovered a counterintuitive result whereby particles called bosons do not behave as expected-they are overlapping, and not interfering-due to the combination of interference and so-called exchange interaction. The latter is a quantum mechanical effect that alters their symmetry when identical particles are exchanged.
Electronics based on a two dimensional electron gas
by on Mon, 03 Mar 2014 15:40:13 EST:
Usually, microelectronic devices are made of silicon or similar semiconductors. Recently, the electronic properties of metal oxides have become quite interesting. These materials are more complex, yet offer a broader range of possibilities to tune their properties. An important breakthrough has now been achieved: a two dimensional electron gas was created in strontium titanate. In a thin layer just below the surface electrons can move freely and occupy different quantum states.
Relativity shakes a magnet: New principle for magnetic recording
by on Mon, 03 Mar 2014 08:35:57 EST:
Scientists have predicted and discovered a new physical phenomenon that allows to manipulate the state of a magnet by electric signals. Current technologies for writing, storing, and reading information are either charge-based or spin-based. Semiconductor flash or random access memories are prime examples among the large variety of charge-based devices. They utilize the possibility offered by semiconductors to easily electrically manipulate and detect their electronic charge states representing the "zeros" and "ones". The downside is that weak perturbations such as impurities, temperature change, or radiation can lead to uncontrolled charge redistributions and, as a consequence, to data loss. Spin-based devices operate on an entirely distinct principle.
A molecular ballet under the X-ray laser: taking images of free molecules
by on Fri, 28 Feb 2014 10:34:33 EST:
An international team of researchers has used the world's most powerful X-ray laser to take snapshots of free molecules. The research team choreographed a kind of molecular ballet in the X-ray beam. The conventional way to determine the atomic structure of molecules is to "freeze" them in a crystal and illuminate them with bright X-rays. However, many molecules are extremely difficult to crystallize. In particular, this is a problem with many biomolecules. There are existing techniques to image single molecules, but none of these is fast enough to catch the ultra-fast motion of molecules. With their new work, the researchers have cleared important hurdles on the way to X-ray images of individual molecules.
A sharp eye for molecular fingerprints: Broad absorption spectra recorded on microsecond scale with two laser frequency combs
by on Fri, 28 Feb 2014 08:06:49 EST:
Scientists have developed a new method of real-time identification and quantification of molecular species. How to retrieve greenhouse gas concentrations in earth atmosphere or to test fundamental laws of quantum mechanics? By measuring the spectrum of light interacting with matter, i.e. measuring the intensity of light transmitted through a medium as a function of its color, it can be done. Each molecule leaves its fingerprint: characteristic absorptions, which make it possible to unambiguously identify it and measure its concentration.
Physicists discover 'quantum droplet' in semiconductor
by on Wed, 26 Feb 2014 13:29:52 EST:
Physicists have used an ultra-fast laser to discover a new semiconductor quasiparticle -- a handful of smaller particles that briefly condense into a liquid-like droplet. The discovery improves understanding of how electrons interact in various situations, including in optoelectronic devices.
Glimmer of light in the search for dark matter
by on Wed, 26 Feb 2014 07:48:29 EST:
Astrophysicists may have identified a trace of dark matter that could signify a new particle: the sterile neutrino. Another research group reported a very similar signal just a few days before.