spin structure
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Spin structure — In differential geometry, a spin structure on an orientable Riemannian manifold allows one to define associated spinor bundles, giving rise to the notion of a spinor in differential geometry. Spin structures have wide applications to mathematical … Wikipedia
Complex spin structure — In mathematics a complex spin group Spin C ( n ) is a generalized form of a spin group. Although not all manifolds admit a spin group, all 4 manifolds admit a complex spin group.Scorpan, A., 2005 The Wild World of 4 Manifolds] The complex spin… … Wikipedia
Nucleon spin structure — describes the partonic structure of nucleon (proton and neutron) intrinsic angular momentum (spin). The key question is how nucleon spin 1/2 is carried by its constituents, say partons (quarks and gluons). It was originally expected before the… … Wikipedia
Spin — Pour les articles homonymes, voir Spin (homonymie). Interaction d un quark (boule rouge) et d un gluon (boule verte) issus de deux protons (boules orange) dont la projection du spin, représentée par l … Wikipédia en Français
Spin group — In mathematics the spin group Spin( n ) is the double cover of the special orthogonal group SO( n ), such that there exists a short exact sequence of Lie groups:1 o mathbb{Z} 2 o operatorname{Spin}(n) o operatorname{SO}(n) o 1.For n gt; 2, Spin(… … Wikipedia
SPIN — On appelle «spin» le moment angulaire ou cinétique intrinsèque des particules quantiques ou quantons. Ce terme anglais évoque le mouvement de rotation propre que peuvent posséder les objets physiques, telles les planètes ou les balles de tennis,… … Encyclopédie Universelle
Spin (physique) — Spin Pour les articles homonymes, voir Spin (homonymie). Le spin est une propriété quantique intrinsèque associée à chaque particule, qui est caractéristique de la nature de la particule, au même titre que sa masse et sa charge électrique. Comme… … Wikipédia en Français
Structure fine — de l hydrogène : influence de la levée partielle de la dégénérescence du niveau d énergie n = 2 sur la raie Lyman α. En physique atomique, la structure fine de la raie spectrale d un atome correspond à sa séparation en plusieurs composantes… … Wikipédia en Français
spin-off — USA A mechanism for separating out a division or line of business from its parent company. Spin offs are typically used to increase stockholder value by increasing the value of the business being spun off or removing a business that no longer… … Law dictionary
Spin wave — Spin waves are propagating disturbances in the ordering of magnetic materials. These low lying collective excitations occur in magnetic lattices with continuous symmetry. From the equivalent quasiparticle point of view, spin waves are known as… … Wikipedia
Spin density wave — (SDW) and charge density wave (CDW) are names for two similar low energy ordered states of solids. Both these states occur at low temperature in anisotropic, low dimensional materials or in metals that have high densities of states at the Fermi… … Wikipedia
