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Physics/Chemistry News
Today's physics/chemistry headlines from the sources selected by our team:

The risks of blowing your own trumpet too soon on research
It was dubbed a "spectacular" discovery – even "Nobel prize-worthy". General Physics News, Tue, 30 Sep 2014 23:43:07 GMT

Deceptive-looking vortex line in superfluid led to twice-mistaken identity
( —So long, solitons: University of Chicago physicists have shown that a group of scientists were incorrect when they concluded that a mysterious effect found in superfluids indicated the presence of solitons—exotic, solitary waves. Instead, they explain, the result was due to more pedestrian, whirlpool-like structures in the fluid. They published their explanation in the Sept. 19 issue of Physical Review Letters. General Physics News, Tue, 30 Sep 2014 23:43:07 GMT

First dark matter search results from Chinese underground lab hosting PandaX-I experiment
Scientists across China and the United States collaborating on the PandaX search for dark matter from an underground lab in southwestern China report results from the first stage of the experiment in a new study published in the Beijing-based journal Science China Physics, Mechanics & Astronomy. General Physics News, Tue, 30 Sep 2014 23:43:07 GMT

Now hear this: Simple fluid waveguide performs spectral analysis in a manner similar to the cochlea
( —Within the mammalian inner ear, or cochlea, a remarkable but and long-debated phenomenon occurs: As they move from the base of the cochlea to its apex, traveling fluid waves – that is, surface waves, in which (like waves on the sea and or in a canal) water moves both longitudinally and transversally – peak in amplitude at locations that depend on the wave's frequency. (Higher frequencies are concentrated in the base, lower frequencies in the apex.) What's critical is that these peaks allow us to identify and separate sounds. While cochlear frequency selectivity is typically explained by local resonances, this idea has two problems: resonance-based models require excessive intracochlear mass, and moreover cannot accurately represent the cochlea's production of both phase and amplitude information. Recently, however, Prof. Marcel van der Heijden at Erasmus Medical Center, University Medical Center, Rotterdam, has rejected resonance, and in its place has designed and fabricated a novel neural data-inspired approach to producing these frequency-dependent amplitude peaks in the form of a disarmingly simple waveguide that, in a manner analogous to an optical prism, carries fluid waves and performs spectral analysis. By incorporating a longitudinal gradient, the waveguide – which consists of two parallel fluid-filled chambers connected by a narrow slit spanned by two coupled elastic beams – separates frequencies and decelerates energy transport through wave dispersion, thereby focusing the peak-creating energy. Its novelty derives from its spectral analysis functionality being based not on resonance, nor on standing waves or geometric periodicity, but on mode shape swapping – an abrupt exchange of shapes between propagating wave modes – making it a new physical effect based on well-known physics. General Physics News, Tue, 30 Sep 2014 23:43:07 GMT

New transparent nanoscintillators for radiation detection developed
Tadiation detection properties have been identified in a light-emitting nanostructure made in a new way from two of the least expensive rare earth elements. The new material is made from two of the least expensive rare earth elements, so it is cost-effective, estimated at a little over $7 per cm3.
Physics News -- ScienceDaily, Tue, 30 Sep 2014 23:43:08 GMT

From diamonds to super computers
By exchanging specific atoms inside the mineral structure, quantum bits, required to process complex operations faster, could be stabilized.
Physics News -- ScienceDaily, Tue, 30 Sep 2014 23:43:08 GMT

Ultra-fast semiconductor nano-lasers turn on and off faster than any before
Physicist have develop ultra-fast semiconductor nano-lasers. One thousand billion operations per second – this peak value has now been achieved by semiconductor nano-lasers.
Physics News -- ScienceDaily, Tue, 30 Sep 2014 23:43:08 GMT

Quantum data are compressed for the first time
Physicists manage to squeeze three qubits into two news, Tue, 30 Sep 2014 23:43:08 GMT

Japan seeks to splurge on big-science facilities
Education ministry asks for 18% increase in annual spending news, Tue, 30 Sep 2014 23:43:08 GMT

Photons weave their way through a triple slit
Path-integral analysis reveals flaw in interpretation of beloved experiment news, Tue, 30 Sep 2014 23:43:08 GMT

Dolphins Are Apparently Attracted to Magnets
Where does this fit into their plot for world domination?
Physics News, Tue, 30 Sep 2014 23:43:08 GMT

Engineers devise technology for rapidly testing drug-delivery vehicles in zebrafish
MIT engineers have devised a way to rapidly test hundreds of different drug-delivery vehicles in living animals, making it easier to discover promising new ways to deliver a class of drugs called ...
Physics News, Tue, 30 Sep 2014 23:43:08 GMT

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