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Pions as spin waves: Chiral symmetry breaking in lattice gauge theory

par Greensite, Jeffrey ;Primack, Joel
Référence Nuclear physics. B, 180, 1, page (170-180)
Publication Publié, 1981-01

Article révisé par les pairs

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Résumé :

In hamiltonian lattice gauge theory, the fermion vacuum at lowest order in 1/g2 can be determined from degenerate perturbation theory plus mean field-spin wave techniques. Using compact QED as an example, we show that: (i) chiral symmetry is spontaneously broken; and (ii) mpseudoGoldstone2 ∝ mfermion〈ψψ〉. The pseudoscalar pseudoGoldstone particles-the "pions" of this abelian theory-correspond to antiferromagnetic spin wave excitations of the fermion vacuum. © 1981.