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Emergent phases in a compass chain with multisite interactions.
- Source :
-
Physical Review B . 6/8/2017, Vol. 95 Issue 22, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- We study a dimerized spin chain with biaxial magnetic interacting ions in the presence of externally induced three-site interactions out of equilibrium. In the general case, the three-site interactions play a role in renormalizing the effective uniform magnetic field. We find that the existence of zero-energy Majorana modes is intricately related to the sign of Pfaffian of the Bogoliubov-de Gennes Hamiltonian and the relevant Z2 topological invariant. In contrast, we show that an exotic spin-liquid phase can emerge in the compass limit through a Berezinskii-Kosterlitz-Thouless (BKT) quantum phase transition. Such a BKT transition is characterized by a large dynamic exponent z=4, and the spin-liquid phase is robust under a uniform magnetic field. We find the relative entropy and the quantum discord can signal the BKT transitions. We also uncover a few differences in deriving the correlation functions for the systems with broken reflection symmetry. [ABSTRACT FROM AUTHOR]
- Subjects :
- *EQUILIBRIUM
*MAGNETIC fields
*QUANTUM theory
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 95
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 123989114
- Full Text :
- https://doi.org/10.1103/PhysRevB.95.224404