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# Harmonic oscillator (quantum)/Related Articles

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*See also changes related to Harmonic oscillator (quantum), or pages that link to Harmonic oscillator (quantum) or to this page or whose text contains "Harmonic oscillator (quantum)".*

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- Electromagnetic wave [r]: A change, periodic in space and time, of an electric field
**E**(**r**,t) and a magnetic field**B**(**r**,t); a stream of electromagnetic waves, referred to as electromagnetic radiation, can be seen as a stream of massless elementary particles, named photons.^{[e]} - Energy (science) [r]: A measurable physical quantity of a system which can be expressed in joules (the metric unit for a quantity of energy) or other measurement units such as ergs, calories, watt-hours or Btu.
^{[e]} - Harmonic oscillator (classical) [r]: A system which, when displaced from its equilibrium position, experiences a restoring force, proportional to the displacement.
^{[e]} - Harmonic oscillator [r]:
*Add brief definition or description* - Hermite polynomial [r]: Polynomials
*H*_{n}that are orthogonal with respect to an inner product defined as^{[e]} - Molecular Hamiltonian [r]: Quantum mechanical operator describing the energy associated with motions and interactions of the electrons and nuclei that constitute a molecule.
^{[e]} - Quantum mechanics [r]: An important branch of physics dealing with the behavior of matter and energy at very small scales.
^{[e]} - Schrödinger equation [r]: A differential equation of quantum mechanics, describing the spatial and temporal behavior of wave functions.
^{[e]} - Simple harmonic oscillator [r]: One-dimensional system showing periodic motion
^{[e]} - Zero-point energy [r]: The lowest possible energy that a quantum mechanical physical system may possess; it is the energy of the ground state of the system.
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