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Physics news 1234

Researchers develop 2-D invisibility cloak

December 18, 2007 | User rating: 4.5 / 5 after 75 vote(s) | User comments: 4

Harry Potter may not have talked much about plasmonics in J. K. Rowling's fantasy series, but University of Maryland researchers are using this emerging technology to develop an invisibility cloak that exists beyond the world ...


Tribute to MIT Physics Prof Lewin: Free-On-Line MIT Courses

December 20, 2007 | User rating: 4.8 / 5 after 72 vote(s) | User comments: 5

The Massachusetts Institute of Technology is offering 1800 full courses on-line to the public at no charge. In part the work of Professor Walter H.G. Lewin of MIT is the reason for the popularization of higher ...


Light Source Lasts 12 Years - No Electricity Needed

December 13, 2007 | User rating: 4.6 / 5 after 89 vote(s) | User comments: 7

A company called MPK is designing a light source that will glow continuously for more than 12 years without any additional energy.


Wormholes on Earth?

November 14, 2007 | User rating: 4.5 / 5 after 157 vote(s) | User comments: 7

According to a group of mathematicians, it may be possible to create devices with internal tunnels that are invisible to detection by electromagnetic waves—wormholes, in a sense. The group discusses the idea in a paper published ...


Nonlocality of a Single Particle Demonstrated Without Objections

November 09, 2007 | User rating: 4.7 / 5 after 151 vote(s) | User comments: 33

Usually when physicists talk about nonlocality in quantum mechanics, they’re referring to the fact that two particles can have immediate effects on each other, even when separated by large distances. Einstein ...


Michigan laser beam believed to set record for intensity

February 15, 2008 | User rating: 4.7 / 5 after 119 vote(s) | User comments: 6

If you could hold a giant magnifying glass in space and focus all the sunlight shining toward Earth onto one grain of sand, that concentrated ray would approach the intensity of a new laser beam made in a ...


Physicists Seek Answers to Quantum Correlations

August 14, 2008 | User rating: 4.6 / 5 after 124 vote(s) | User comments: 41

After performing multiple tests on two entangled photons, physicists have yet again found that the photons seem to be communicating faster than the speed of light - at least 100,000 times faster. The researchers ...


Researchers Demonstrate Quantum Teleportation and Memory in Tandem

January 30, 2008 | User rating: 4.6 / 5 after 102 vote(s) | User comments: 14

In research that may be a key step toward real-life quantum communication—the transmission of information using atoms, photons, or other quantum objects—researchers created an experiment in which a quantum bit of information ...


The world's lowest noise laser: Researchers outsmart quantum physics

January 25, 2008 | User rating: 4.7 / 5 after 128 vote(s) | User comments: 8

Researchers at the Max Planck Institute for Gravitational Physics and Leibniz University of Hanover have produced a laser beam of especially high quality. In doing so, they have achieved a new world record ...


Physicists investigate how time moves forward

September 05, 2008 | User rating: 4.3 / 5 after 104 vote(s) | User comments: 28

As humans, we have a very intuitive concept of time, and of the differences between the past, present, and future. But, as scientists Edward Feng of the University of California, Berkeley, and Gavin Crooks of the Lawrence ...


Ultra-Fast Quantum-Dot Information Storage

March 21, 2008 | User rating: 4.7 / 5 after 95 vote(s) | User comments: 8

The information-storage market is dominated by two main types: Flash memory, used in memory sticks and cell phones, and dynamic random access memory (DRAM), which is the main memory in a personal computer. Both types have ...


'Phononic Computer' Could Process Information with Heat

November 02, 2007 | User rating: 4.2 / 5 after 74 vote(s) | User comments: 8

Most computers today use electrons to carry information, while theoretical optical computers use photons. Recently, physicists from Singapore have proposed a third type of computer: a “phononic computer,” ...


New aluminum-rich alloy produces hydrogen on-demand for large-scale uses

February 19, 2008 | User rating: 4.5 / 5 after 100 vote(s) | User comments: 6

Purdue University engineers have developed a new aluminum-rich alloy that produces hydrogen by splitting water and is economically competitive with conventional fuels for transportation and power generation.


Moth eyes may hold key to more efficient solar cells

February 22, 2008 | User rating: 4.7 / 5 after 111 vote(s) | User comments: 4

One of the difficulties with solar power is that solar cells are notoriously inefficient. Some of that inefficiency, says Peng Jiang, is due to the fact that silicon is reflective. Jiang, an assistant professor ...


Relativity Derived Without Calculus -- Possibly Centuries Ago

October 08, 2007 | User rating: 4.3 / 5 after 140 vote(s) | User comments: 4

After Einstein developed his theories of special and general relativity, in 1905 and 1916, respectively, the world of physics changed dramatically. The theories, with their groundbreaking ideas on space and ...


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