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Chiral magnetic effect — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Chiral_magnetic_effect
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-06T11:04:48.572Z
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Chiral magnetic effect — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Chiral_magnetic_effect (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_331e54575f9d (Metraipolis archive dc_331e54575f9d, sha256 48b67777d4ebf0053d14c696ba812fdb4c955ad2899c8cbbc0f89eb6c5dc62cf)

BibTeX

@misc{dc331e54575f9d,
  title = {Chiral magnetic effect — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Chiral_magnetic_effect},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_331e54575f9d; sha256 48b67777d4ebf0053d14c696ba812fdb4c955ad2899c8cbbc0f89eb6c5dc62cf},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Chiral_magnetic_effect. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Chiral magnetic effect (CME) is the generation of electric current along an external magnetic field induced by chirality imbalance. Fermions are said to be chiral if they keep a definite projection of spin quantum number on momentum. The CME is a macroscopic quantum phenomenon present in systems with charged chiral fermions, such as the quark–gluon plasma, or Dirac and Weyl semimetals. The CME is a consequence of chiral anomaly in quantum field theory; unlike conventional superconductivity or superfluidity, it does not require a spontaneous symmetry breaking. The chiral magnetic current is non-dissipative, because it is topologically protected: the imbalance between the densities of left-handed and right-handed chiral fermions is linked to the topology of fields in gauge theory by the Atiyah-Singer index theorem. The experimental observation of CME in a Dirac semimetal, zirconium pentatelluride (ZrTe5), was reported in 2014 by a group from Brookhaven National Laboratory and Stony Brook University. The material showed a conductivity increase in the Lorentz force-free configuration of the parallel magnetic and electric fields. In 2015, the STAR detector at Brookhaven's Relativistic Heavy Ion Collider and ALICE at CERN presented experimental evidence for the existence of CME in the quark–gluon plasma.

Tema degli esploratori: fisica e astronomia (deposito sistematico; categoria «Condensed matter physics»).
Fonte: Wikipedia in inglese, voce «Chiral magnetic effect» — https://en.wikipedia.org/wiki/Chiral_magnetic_effect
Wikidata Q25304890: «the generation of electric current along an external magnetic field induced by chirality imbalance» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q25304890
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Chiral_magnetic_effect?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1312853830, consultata il 2026-10-06T09:49:07.155Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: fae621cd6734f652c228eaf20a530f2fa735cc30e03b940c79e260f74261a445