spin correlation function

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• Correlation function (statistical mechanics) — For other uses, see Correlation function (disambiguation). In statistical mechanics, the correlation function is a measure of the order in a system, as characterized by a mathematical correlation function, and describes how microscopic variables… …   Wikipedia

• Spin-statistics theorem — Statistical mechanics Thermodynamics · …   Wikipedia

• Correlation spectroscopy — is one of several types of two dimensional nuclear magnetic resonance (NMR) spectroscopy. Other types of two dimensional NMR include J spectroscopy, exchange spectroscopy (EXSY), and Nuclear Overhauser effect spectroscopy (NOESY). Two dimensional …   Wikipedia

• Spin contamination — In computational chemistry, spin contamination is the artificial mixing of different electronic spin states. This can occur when an approximate orbital based wave function is represented in an unrestricted form – that is, when the spatial parts… …   Wikipedia

• Neutron spin echo — Science with Neutrons Foundations Neutron temperature Flux · Radiation  …   Wikipedia

• Electronic correlation — refers to the interaction between electrons in a quantum system whose electronic structure is being considered. The term correlation stems from mathematical statistics and means that two distribution functions, f and g , are not independent of… …   Wikipedia

• Contamination de spin — En chimie numérique, la contamination de spin est le mélange artificiel de plusieurs états de spins électroniques. Ce mélange peut se produire lorsqu une fonction d onde basée sur une fonction orbitalaire approchée est représentée sous une forme… …   Wikipédia en Français

• Order and disorder (physics) — In physics, the terms order and disorder designate the presence or absence of some symmetry or correlation in a many particle system. In condensed matter physics, systems typically are ordered at low temperatures; upon heating, they undergo one… …   Wikipedia

• Long-range order — In physics, long range order characterizes physical systems in which remote portions of the same sample exhibit correlated behavior.This can be seen with a correlation function, namely the spin spin correlation function:G(x,x ) = langle s(x)s(x ) …   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

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium