TechAndComputer (Feb. 26, 2012) Most people attempt to reduce the little uncertainties of life by carrying umbrellas on cloudy days, purchasing automobile insurance or hiring inspectors to evaluate homes they might consider purchasing. For scientists, reducing uncertainty is a no less important goal, though in the weird realm of quantum physics, the term has a more specific meaning.
For scientists working in quantum physics, the Heisenberg Uncertainty Principle says that measurements of properties such as the momentum of an object and its exact position cannot be simultaneously specified with arbitrary accuracy. As a result, there must be some uncertainty in either the exact position of the object, or its exact momentum...
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Squeezing what hasn't been squeezed before: Another victory over uncertainty in quantum physics measurements
- 26 February 2012
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Cooling semiconductors by laser light
- 22 January 2012
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TechAndComputer (Jan. 22, 2012) Researchers at the Niels Bohr Institute have combined two fields -- quantum physics and nano physics -- and this has led to the discovery of a new method for laser cooling semiconductor membranes. Semiconductors are vital components in solar cells, LEDs and many other electronics, and the efficient cooling of components is important for future quantum computers and ultrasensitive sensors. The new cooling method...
TechAndComputer (Jan. 22, 2012) ...
TechAndComputer (Jan. 22, 2012) ...
World's smallest magnetic data storage unit
- 12 January 2012
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TechAndComputer (Jan. 12, 2012) Scientists from IBM and the German Center for Free-Electron Laser Science (CFEL) have built the world's smallest magnetic data storage unit. It uses just twelve atoms per bit, the basic unit of information, and squeezes a whole byte (8 bit) into as few as 96 atoms. A modern hard drive, for comparison, still needs more than half a billion atoms per byte.
The team presented their work in the journal Science on...
TechAndComputer (Jan. 12, 2012) Scientists...
The team presented their work in the journal Science on...
TechAndComputer (Jan. 12, 2012) Scientists...
Quantum cats are hard to see: Researchers explain the difficulty of detecting quantum effects
- 16 December 2011
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TechAndComputer (Dec. 16, 2011) Are there parallel universes? And how will we know? This is one of many fascinations people hold about quantum physics. Researchers from the universities of Calgary and Waterloo and the University of Geneva in Switzerland have published a paper in Physical Review Letters explaining why we don't usually see the physical effects of quantum mechanics.
"Quantum physics works fantastically well on small scales but...
TechAndComputer (Dec. 16, 2011) Are there...
"Quantum physics works fantastically well on small scales but...
TechAndComputer (Dec. 16, 2011) Are there...
One clock with two times: When quantum mechanics meets general relativity
- 20 October 2011
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TechAndComputer (Oct. 20, 2011) The unification of quantum mechanics and Einstein's general relativity is one of the most exciting and still open questions in modern physics. General relativity, the joint theory of gravity, space and time gives predictions that become clearly evident on a cosmic scale of stars and galaxies. Quantum effects, on the other hand, are fragile and are typically observed on small scales, e.g. when considering single...
TechAndComputer (Oct. 20, 2011) The...
TechAndComputer (Oct. 20, 2011) The...