Quantum mechanics
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| - | That branch of [[physics]] which studies [[matter]] and [[energy]] at the level of [[atom]]s and other [[elementary]] [[particle]]s, and substitutes [[probabilistic]] mechanisms for [[classical]] [[Newtonian]] ones. | + | |
| + | '''Quantum mechanics''' ('''QM'''; also known as '''quantum physics''' or '''quantum theory'''), including [[quantum field theory]], is a fundamental branch of [[physics]] concerned with processes involving, for example, [[atom]]s and [[photons]]. Systems such as these which obey quantum mechanics can be in a [[quantum superposition]] of different states, unlike in [[classical physics]]. | ||
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| + | Quantum mechanics [[History of quantum mechanics|gradually arose]] from [[Max Planck]]'s solution in 1900 to the [[black-body radiation]] problem (reported 1859) and [[Albert Einstein]]'s 1905 paper which offered a quantum-based theory to explain the [[photoelectric effect]] (reported 1887). [[old quantum theory|Early quantum theory]] was profoundly reconceived in the mid-1920s. | ||
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| + | ==See also== | ||
| + | *[[Schrödinger's cat]] | ||
| + | *[[Uncertainty principle]] | ||
| + | * [[Totalitarian principle]] | ||
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Quantum mechanics (QM; also known as quantum physics or quantum theory), including quantum field theory, is a fundamental branch of physics concerned with processes involving, for example, atoms and photons. Systems such as these which obey quantum mechanics can be in a quantum superposition of different states, unlike in classical physics.
Quantum mechanics gradually arose from Max Planck's solution in 1900 to the black-body radiation problem (reported 1859) and Albert Einstein's 1905 paper which offered a quantum-based theory to explain the photoelectric effect (reported 1887). Early quantum theory was profoundly reconceived in the mid-1920s.
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