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  • Counting Nambu-Goldstone Mo...
    Hidaka, Yoshimasa; Hirono, Yuji; Yokokura, Ryo

    Physical review letters, 2021-Feb-19, Letnik: 126, Številka: 7
    Journal Article

    We discuss the counting of Nambu-Goldstone (NG) modes associated with the spontaneous breaking of higher-form global symmetries. Effective field theories of NG modes are developed based on symmetry-breaking patterns, using a generalized coset construction for higher-form symmetries. We derive a formula of the number of gapless NG modes, which involves expectation values of the commutators of conserved charges, possibly of different degrees.