News tagged with quantum
Related topics: quantum computing , physicists
In physics, a quantum (plural: quanta) is an indivisible entity of a quantity that has the same units as the Planck constant and is related to both energy and momentum of elementary particles of matter (called fermions) and of photons and other bosons. The word comes from the Latin "quantus", for "how much." Behind this, one finds the fundamental notion that a physical property may be "quantized", referred to as "quantization". This means that the magnitude can take on only certain discrete numerical values, rather than any value, at least within a range. There is a related term of quantum number.
A photon is often referred to as a "light quantum". The energy of an electron bound to an atom (at rest) is said to be quantized, which results in the stability of atoms, and of matter in general. But these terms can be a little misleading, because what is quantized is this Planck's constant quantity whose units can be viewed as either energy multiplied by time or momentum multiplied by distance.
Usually referred to as quantum "mechanics", it is regarded by virtually every professional physicist as the most fundamental framework we have for understanding and describing nature at the infinitesimal level, for the very practical reason that it works. It is "in the nature of things", not a more or less arbitrary human preference.
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Colonoscopy is regarded as the most thorough way to screen for colon cancer but the potentially life-saving procedure can also be painful. Scientists and engineers are continually researching new methods of screening to reduce ...
Other Apr 27, 2011 | 5 / 5 (1) | 0 |
(Medical Xpress)—CSIRO scientists, in collaboration with researchers at the Bio21 Institute at the University of Melbourne, have developed a new method which could pave the way for a portable Hendra virus ...
Diseases, Conditions, Syndromes Sep 20, 2012 | not rated yet | 0
Researchers at the University of Maryland School of Medicine, who are exploring novel ways to treat serious heart problems in children, have conducted the first direct comparison of the regenerative abilities of neonatal ...
Cardiology Sep 10, 2012 | 5 / 5 (1) | 0
When Stephen Hawking was diagnosed with motor neurone disease aged 21, he was given just a few years to live, but on Wednesday the scientist was to help open the Paralympics at the age of 70.
Other Aug 29, 2012 | 4 / 5 (1) | 0
The theory of quantum metabolism is the idea that quantum processes, such as entanglement, influence the metabolism of cells.
Cancer Mar 27, 2012 | not rated yet | 1
New research from the University of Southampton could lead to enhanced MRI scans, producing brighter and more precise images, and potentially allowing the detection of cancerous cells before they cause health ...
Medical research Dec 15, 2011 | not rated yet | 0