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spontaneous fluctuations

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  • Spontaneous emission — is the process by which a light source such as an atom, molecule, nanocrystal or nucleus in an excited state undergoes a transition to the ground state and emits a photon. Spontaneous emission of light or luminescence is a fundamental process… …   Wikipedia

  • Neural oscillation — is rhythmic or repetitive neural activity in the central nervous system. Neural tissue can generate oscillatory activity in many ways, driven either by mechanisms localized within individual neurons or by interactions between neurons. In… …   Wikipedia

  • Fluctuation dissipation theorem — In statistical physics, the fluctuation dissipation theorem is a powerful tool for predicting the non equilibrium behavior of a system such as the irreversible dissipation of energy into heat from its reversible fluctuations in thermal… …   Wikipedia

  • Little Ice Age — The reconstructed depth of the Little Ice Age varies between different studies (anomalies shown are from the 1950–80 reference period). The Little Ice Age (LIA) was a period of cooling that occurred after the Medieval Warm Period (Medieval… …   Wikipedia

  • Galvanic skin response — (GSR), also known as electrodermal response (EDR), psychogalvanic reflex (PGR), or skin conductance response (SCR), is a method of measuring the electrical resistance of the skin. There has been a long history of electrodermal activity research,… …   Wikipedia

  • Orders of magnitude (voltage) — To help compare different orders of magnitude, the following list describes various voltage levels. Factor (volt) Value Item 10−7 0.5 μV Change in nerve cell potential caused by opening a single acetylcholine receptor channel[1] 10−6 2 μV Noise… …   Wikipedia

  • Mermin–Wagner theorem — In quantum field theory and statistical mechanics, the Mermin–Wagner theorem (also known as Mermin–Wagner–Hohenberg theorem or Coleman theorem) states that continuous symmetries cannot be spontaneously broken at finite temperature in systems with …   Wikipedia

  • Inflation (cosmology) — Inflation model and Inflation theory redirect here. For a general rise in the price level, see Inflation. For other uses, see Inflation (disambiguation). Physical cosmology …   Wikipedia

  • Cosmic inflation — In physical cosmology, cosmic inflation is the idea that the universe passed through a phase of exponential expansion that was driven by a negative pressure vacuum energy density. [Liddle and Lyth (2000) and Mukhanov (2005) are recent cosmology… …   Wikipedia

  • Ising model — The Ising model, named after the physicist Ernst Ising, is a mathematical model in statistical mechanics. It has since been used to model diverse phenomena in which bits of information, interacting in pairs, produce collectiveeffects.Definition… …   Wikipedia

  • Friedrich Hayek — Infobox Philosopher region = Western Philosophy era = 20th century philosophy color = #B0C4DE name = Friedrich August von Hayek birth = birth date|1899|5|8 Vienna, Austria Hungary death = death date and age|1992|3|23|1899|5|8 Freiburg, Germany… …   Wikipedia


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