Related topics: quantum mechanics
Quantum mechanics
hideQuantum mechanics is a set of principles underlying the most fundamental known description of all physical systems at the submicroscopic scale (at the atomic level). Notable among these principles are simultaneous wave-like and particle-like behavior of matter and radiation ("Wave–particle duality"), and the prediction of probabilities in situations where classical physics predicts certainties. Classical physics can be derived as a good approximation to quantum physics, typically in circumstances with large numbers of particles. Thus quantum phenomena are particularly relevant in systems whose dimensions are close to the atomic scale, such as molecules, atoms, electrons, protons and other subatomic particles. Exceptions exist for certain systems which exhibit quantum mechanical effects on macroscopic scale; superfluidity is one well-known example. Quantum theory provides accurate descriptions for many previously unexplained phenomena such as black body radiation and stable electron orbits. It has also given insight into the workings of many different biological systems, including smell receptors and protein structures.
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News tagged with quantum physics
Physics rules network dynamics
Dec 11, 2009 |
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(PhysOrg.com) -- When it comes to the workings of the Web, the brain, or a social network, physics finds universal truths.
Search results for quantum physics
Physicists propose quantum entanglement for motion of microscopic objects
Dec 21, 2009 |
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Researchers at the California Institute of Technology (Caltech) have proposed a new paradigm that should allow scientists to observe quantum behavior in small mechanical systems.
Hot Electrons Could Double Solar Cell Power Efficiency
Dec 18, 2009 |
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Scientists have experimentally verified a theory suggesting that hot electrons could double the output of solar cells. The researchers, from Boston College, have built solar cells that successfully use hot ...
Researcher studies the universe through quantum electrodynamics
Dec 17, 2009 |
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(PhysOrg.com) -- Fundamental constants, such as the standards for length and mass, are a given in our society. However, research has shown that these constants might be changing slightly with the expansion of the universe.
Proposed Spacetime Structure Could Provide Hints for Quantum Gravity Theory
Dec 16, 2009 |
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(PhysOrg.com) -- Spacetime, which consists of three dimensions of space and one time dimension, is such a large, abstract concept that scientists have a very difficult time understanding and defining it. Moreover, ...
AOptix Technologies and NuCrypt demonstrate physical-layer quantum encryption
Dec 14, 2009 |
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AOptix Technologies, a leading edge developer of ultra-high bandwidth laser communication solutions, and NuCrypt, a provider of technology for ultra-high security over optical communication networks, disclosed today the recent ...
Rice physicists find reappearing quantum trios
Dec 11, 2009 |
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Using atoms at temperatures colder than deep space, Rice University physicists have delivered overwhelming proof for a once-scoffed-at theory that's become a hotbed for research some 40 years after it first ...
Does weak equivalence break down at the quantum level?
Dec 08, 2009 |
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(PhysOrg.com) -- One of the givens in physics is the weak equivalence principle. This principle has been considered solid since Einstein proposed that it is not possible to detect the difference between uniform acceleration ...
A see-through surprise: Scientists make solid material transparent to terahertz waves
Dec 07, 2009 |
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Very often in science, the unexpected discovery turns out to be the most significant. Rice University Professor Junichiro Kono and his team weren't looking for a breakthrough in the transmission of terahertz signals, but ...
Super cool atom thermometer
Dec 07, 2009 |
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As physicists strive to cool atoms down to ever more frigid temperatures, they face the daunting task of developing new, reliable ways of measuring these extreme lows. Now a team of physicists has devised ...
Metamaterials could reduce friction in nanomachines
Nanotechnology / Nanomaterials
Dec 07, 2009 |
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(PhysOrg.com) -- Nanoscale machines expected to have wide application in industry, energy, medicine and other fields may someday operate far more efficiently thanks to important theoretical discoveries concerning the manipulation ...
List of search results for quantum physics
