# Harmonic oscillator (quantum)/Related Articles

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A list of Citizendium articles, and planned articles, about 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 Hn that are orthogonal with respect to an inner product defined as ${\displaystyle \left(H_{n'},H_{n}\right)\equiv \int _{-\infty }^{\infty }H_{n'}(x)H_{n}(x)\;e^{-x^{2}}\;\mathrm {d} x.}$ [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. [e]