@prefix mdl: <http://data.loterre.fr/ark:/67375/MDL> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

mdl: a skos:ConceptScheme .
mdl:-QD9LLLTN-L
  skos:hiddenLabel "Transition phases quantiques"@fr, "transitions de phases quantiques"@fr, "Transition phase quantique"@fr, "quantum phase transitions"@en, "Quantum phase transition"@en ;
  skos:definition "In physics, a quantum phase transition (QPT) is a phase transition between different quantum phases (phases of matter at zero temperature). Contrary to classical phase transitions, quantum phase transitions can only be accessed by varying a physical parameter—such as magnetic field or pressure—at absolute zero temperature. The transition describes an abrupt change in the ground state of a many-body system due to its quantum fluctuations. Such a quantum phase transition can be a second-order phase transition. Quantum phase transitions can also be represented by the topological fermion condensation quantum phase transition, see e.g. strongly correlated quantum spin liquid. In case of three dimensional Fermi liquid, this transition transforms the Fermi surface into a Fermi volume. Such a transition can be a first-order phase transition, for it transforms two dimensional structure (Fermi surface) into three dimensional. As a result, the topological charge of Fermi liquid changes abruptly, since it takes only one of a discrete set of values. (Wikipedia, The Free Encyclopedia, <a href=\"https://en.wikipedia.org/wiki/Quantum_phase_transition\" target=\"_blank\">https://en.wikipedia.org/wiki/Quantum_phase_transition</a>)"@en, "En physique, une transition de phase quantique (TPQ) est une transition de phase entre les différentes phases quantiques (en) (phases de la matière à température nulle). Contrairement aux transitions de phase classique, les transitions de phase quantique ne sont accessibles que par la variation d'un paramètre physique tel que le champ magnétique ou la pression à la température du zéro absolu. La transition décrit un brusque changement de l’état fondamental d'un système à plusieurs corps causé des fluctuations quantiques. Une telle transition de phase quantique peut être une transition de phase du second ordre. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/Transition_de_phase_quantique\" target=\"_blank\">https://fr.wikipedia.org/wiki/Transition_de_phase_quantique</a>)"@fr ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Transition_de_phase_quantique>, <https://en.wikipedia.org/wiki/Quantum_phase_transition> ;
  skos:broader mdl:-FHD2FC4V-4 ;
  skos:inScheme mdl: ;
  skos:prefLabel "transition de phase quantique"@fr, "quantum phase transition"@en ;
  a skos:Concept .

mdl:-FHD2FC4V-4
  skos:prefLabel "phase transition"@en, "transition de phase"@fr ;
  a skos:Concept ;
  skos:narrower mdl:-QD9LLLTN-L .