Artikel ; Online: Conformally invariant free-parafermionic quantum chains with multispin interactions.
2024 Band 109, Heft 4-1, Seite(n) 44138
Abstract: We calculate the spectral properties of two related families of non-Hermitian free-particle quantum chains with N-multispin interactions (N=2,3, ... ). The first family have a Z(N) symmetry and are described by free parafermions. The second have a U(1) ... ...
Abstract | We calculate the spectral properties of two related families of non-Hermitian free-particle quantum chains with N-multispin interactions (N=2,3,...). The first family have a Z(N) symmetry and are described by free parafermions. The second have a U(1) symmetry and are generalizations of XX quantum chains described by free fermions. The eigenspectra of both free-particle families are formed by the combination of the same pseudo-energies. The models have a multicritical point with dynamical critical exponent z=1. The finite-size behavior of their eigenspectra, as well as the entanglement properties of their ground-state wave function, indicate the models are conformally invariant. The models with open and periodic boundary conditions show quite distinct physics due to their non-Hermiticity. The models defined with open boundaries have a single conformal invariant phase, while the XX multispin models show multiple phases with distinct conformal central charges in the periodic case. |
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Sprache | Englisch |
Erscheinungsdatum | 2024-05-16 |
Erscheinungsland | United States |
Dokumenttyp | Journal Article |
ZDB-ID | 2844562-4 |
ISSN | 2470-0053 ; 2470-0045 |
ISSN (online) | 2470-0053 |
ISSN | 2470-0045 |
DOI | 10.1103/PhysRevE.109.044138 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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