Posts tagged semiconductors

Quantum Networks Advance with Entanglement of Photons

Aug 6th

Posted by scott fagan in News

No comments

A team of Harvard physicists led by Mikhail D. Lukin has achieved the first-ever quantum entanglement of photons and solid-state materials.

…Quantum networking applications such as long-distance communication and distributed computing would require the nodes that process and store quantum data in qubits to be connected to one another by entanglement, a state where two different atoms become indelibly linked such that one inherits the properties of the other.
“In quantum computing and quantum communication, a big question has been whether or how it would be possible to actually connect qubits, separated by long distances, to one another,” says Lukin, professor of physics at Harvard and co-author of a paper describing the work in this week’s issue of the journal Nature. “Demonstration of quantum entanglement between a solid-state material and photons is an important advance toward linking qubits together into a quantum network.”
Quantum entanglement has previously been demonstrated only with photons and individual ions or atoms.
“Our work takes this one step further, showing how one can engineer and control the interaction between individual…

View post:
Quantum Networks Advance with Entanglement of Photons

Possibly related posts:

, , , , , , , , , , , , ,

Ultra-Strong Interaction Between Light and Matter Realized

Aug 1st

Posted by zanx in News

No comments

Researchers around the world are working on the development of quantum computers that will be vastly superior to present-day computers. Here, the strong coupling of quantum bits with light quanta plays a pivotal role. Professor Rudolf Gross, a physicist at the Technische Universitaet Muenchen, Germany, …

…EnlargeThis is an electron microscopical picture of the superconducting circuit (red: Aluminum-Qubit, grey: Niob-Resonator, green: Silicon substrate). Credit: Thomasz Niemczyk, Technische Universitaet MuenchenTo facilitate the measurements, Professor Gross and his team captured the photon in a special box, a resonator. This consists of a superconducting niobium conducting path that is configured with strongly reflective “mirrors” for microwaves at both ends. In this resonator, the artificial atom made of an aluminum circuit is positioned so that it can optimally interact with the photon. The researchers achieved the ultrastrong interactions by adding another superconducting component into their circuit, a so-called Josephson junction.
The measured interaction strength was up to twelve percent of the resonator frequency. This makes it ten times stronger than the effects previously measureable in circuit QED systems and thousands of times stronger than in a true cavity resonator. However, along with their…

See the rest here:
Ultra-Strong Interaction Between Light and Matter Realized

Possibly related posts:

Possibly related posts:

, , , , , , , , , , , , ,

Model Describes Universe with No Big Bang, No Beginning

Jul 31st

Posted by nimbyx in News

No comments

By suggesting that mass, time, and length can be converted into one another as the universe evolves, Wun-Yi Shu has proposed a new class of cosmological models that may fit observations of the universe better than the current big bang model. What this means specifically is that the …

…Is the overall entropy of the universe constant? If the universe has been around for eternity then it must. If so how? Quite easily. One half of observable Universe (this one smaller then the human creatures) expands and it gains entropy. The remaining one collapses due its gravity into more dense state, thus balancing entropy of Universe. Everyone can observe it. From dense aether theory follows, the middle of the entropic scale would be defined exactly by wavelength of cosmic microwave noise. Universe should exhibit red shift, when being observed in shorter wavelengths - and blue shift for longer wavelengths, for example the radiowaves. Nothing actually expands or collapses here, though - it’s a geometric phenomena resulting from transverse wave spreading through random inhomogeneous environment. You can observe this effect during heavy rain as a dark Alexander’s band between primary and secondary rainbows. The dense rain droplets are playing the role of CMB noise here….

Go here to read the rest:
Model Describes Universe with No Big Bang, No Beginning

Possibly related posts:

Possibly related posts:

, , , , , , , , , , , ,

New gov’t rules allow unapproved iPhone apps & Jailbreaking.

Jul 26th

Posted by Jane in News

No comments

Owners of the iPhone will be able to break electronic locks on their devices in order to download applications that have not been approved by Apple. The government is making that legal under new rules announced Monday.

…So the government is telling me I can do something I’m already doing. Just wish they would get around to marijuana. Just move to beautiful Colorado, like I did. :)Here are some other things they will allow (lol finally getting around to DVDs):…

Follow this link:
New gov’t rules allow unapproved iPhone apps & Jailbreaking.

Possibly related posts:

, , , , , , , , , , , , , ,

Anti-AIDS gel helps prevent infection, study Finds!

Jul 19th

Posted by jos in News

No comments

Researchers are reporting a breakthrough against AIDS. A vaginal gel containing an AIDS drug cut in half a woman’s chances of getting HIV from an infected partner.

…it was made for this and another ongoing study from a drug donated by California-based Gilead Sciences Inc., which sells tenofovir in pill form as Viread.
The study tested it in 889 heterosexual women in and near Durban, South Africa. Half were given the microbicide and the others, a dummy gel. Women were told to use it 12 hours before sex and as soon as possible within 12 hours afterward.
At the study’s end, there were 38 HIV infections among the microbicide group versus 60 in the others.
The gel seemed safe - only mild diarrhea was slightly more common among those using it. Surveys showed that the vast majority of women found it easy to use and said their partners didn’t mind it. And 99 percent of the women said they would use the gel if they knew for sure that it prevented HIV….

Go here to see the original:
Anti-AIDS gel helps prevent infection, study Finds!

, , , , , , , , , , , ,

U.S. Scientists Develop Artificial Blood for the Battlefield

Jul 18th

Posted by sammy3 in News

No comments

(PhysOrg.com) — US scientists working for the experimental arm of the Pentagon have developed artificial blood for use in transfusions for wounded soldiers in battlefields. The blood cells are said to be functionally indistinguishable from normal blood cells and could end forever the problem of blood …

…The blood is made from hematopoietic stem cells from discarded human umbilical cords, which are turned into large quantities of red blood cells by a method called “blood pharming” that mimics the functions of bone marrow. Pharming is a method of using genetically engineered plants or animals to create medically useful substances in large quantities. Using this process the cells from one umbilical cord can produce about 20 units of blood, which is enough for over three transfusions for injured soldiers in the field.
The blood is being manufactured for the Defense Advanced Research Projects Agency (DARPA) by Ohio company Arteriocyte, which has already submitted samples of O-negative blood to the US Food and Drug Administration (FDA) for evaluation and safety testing. The company received funding of $1.95 million in 2008 to find a way of making large quantities of artificial blood.
Don Brown of Arteriocyte said the method works but the production needs to be scaled up to produce enough blood. Scaling up…

Here is the original post:
U.S. Scientists Develop Artificial Blood for the Battlefield

, , , , , , , , ,

Dark Energy Sheds New Light on Universe’s Expansion

Jul 16th

Posted by WakRekBeext in News

No comments

Through observations of massive galaxy clusters, scientists have made the most precise measurements to date of the effects of dark energy and gravity on cosmological scales. This work is an important step toward understanding why the expansion of the universe is accelerating.

…The analysis, contained in four papers published this month in the Monthly Notices of the Royal Astronomical Society, was led by a team based at the Kavli Institute for Particle Astrophysics and Cosmology, located at the Department of Energy’s SLAC National Accelerator Laboratory and Stanford University.
Clusters of galaxies, the largest gravitationally bound objects in the universe, began forming about 10 billion years ago. Because it takes a long time for light from the farthest reaches of the universe to arrive at Earth, the most distant clusters appear as they did when they were much younger, while the closest ones look more their actual ages. By looking at clusters both near and far, researchers were able to study the evolution of clusters and deduce how changes in the universe over billions of years helped shape their growth. The results offer insights into the forces that made the universe we see today.
“As space expands faster and faster, it becomes more difficult for gravity to pull matter…

See more here:
Dark Energy Sheds New Light on Universe’s Expansion

, , , , , , , , , , , , , ,

Part of the brain that tracks limbs in space discovered

Jul 15th

Posted by zanx in News

No comments

Scientists have discovered the part of the brain that tracks the position of our limbs as we move through space.

…When a mosquito lands on your hand, you can rapidly and effortlessly make a movement of the other hand to brush it away, even in darkness. But performing this seemingly simple action involves a surprisingly complex coordination of different types of sensory information in order for your brain to construct a constantly updated ‘map’ of the body in space.
Now, scientists from UCL (University College London) and Barcelona (Pompeu Fabra University, ICREA and University of Barcelona) have identified an area of the human brain called the parietal cortex that constructs this body model from the combination of tactile information from your skin (for example, where the mosquito is on your hand) with “proprioceptive” information about the position of your hand relative to your body.
In an experiment they found that impairing the parietal cortex, using a brief pulse of magnetic stimulation, significantly impaired volunteers’ judgements about the spatial relationship between their face and arms, but not their…

Go here to see the original:
Part of the brain that tracks limbs in space discovered

, , , , , , , ,

Superconductor Breakthrough Could Power New Advances -w/ VID

Jul 12th

Posted by sammy3 in News

No comments

The first batch of a new range of powerful superconductors which could revolutionize the production of machines like hospital MRI scanners and protect the national grid has been developed by scientists.

…Parsec,Now, imagine that superconductor ring housed within a wound coil of copper wire -induced current for free. How about that! Need the cheap materials, first, though… I am no expert, but I’m sure that violates thermodynamics. You would essentially be creating infinite energy from a finite source. To induce a current, you need a time varying magnetic field. A superconductor has a stable static field( I believe). You would either need to change the direction of the electrons or move the superconductor and copper coil relative to each other. Either way, you’d have to expend energy to do that, more than you’d produce for “free”. Even if you didn’t have that, the induced current in your copper would create back emf that would disrupt the electron flow in your super conductor and stop the whole works. Again, correct me if I am wrong, or if I’ve misinterpreted your comment….

See original here:
Superconductor Breakthrough Could Power New Advances -w/ VID

Possibly related posts:

, , , , , , , , , , ,

Black Hole Blows Big Bubble (w/pic)

Jul 8th

Posted by nimbyx in News

No comments

Combining observations made with ESO’s Very Large Telescope and NASA’s Chandra X-ray telescope, astronomers have uncovered the most powerful pair of jets ever seen from a stellar black hole. This object, also known as a microquasar, blows a huge bubble of hot gas, 1000 light-years across, twice as large …

…”We have been astonished by how much energy is injected into the gas by the black hole,” says lead author Manfred Pakull. “This black hole is just a few solar masses, but is a real miniature version of the most powerful quasars and radio galaxies, which contain black holes with masses of a few million times that of the Sun.”
Black holes are known to release a prodigious amount of energy when they swallow matter. It was thought that most of the energy came out in the form of radiation, predominantly X-rays. However, the new findings show that some black holes can release at least as much energy, and perhaps much more, in the form of collimated jets of fast moving particles. The fast jets slam into the surrounding interstellar gas, heating it and triggering an expansion. The inflating bubble contains a mixture of hot gas and ultra-fast particles at different temperatures. Observations in several energy bands (optical, radio, X-rays) help astronomers calculate the total rate at which the black hole is heating…

Visit link:
Black Hole Blows Big Bubble (w/pic)

Possibly related posts:

, , , , , , , , ,
« Older Entries