Multi-critical topological transition at quantum criticality

Abstract

The investigation and characterization of topological quantum phase transition between gapless phases is one of the recent interest of research in topological states of matter. We consider transverse field Ising model with three spin interaction in one dimension and observe a topological transition between gapless phases on one of the critical lines of this model. We study the distinct nature of these gapless phases and show that they belong to different universality classes. The topological invariant number (winding number) characterize different topological phases for the different regime of parameter space. We observe the evidence of two multi-critical points, one is topologically trivial and the other one is topologically active. Topological quantum phase transition between the gapless phases on the critical line occurs through the non-trivial multi-critical point in the Lifshitz universality class. We calculate and analyze the behavior of Wannier state correlation function close to the multi-critical point and confirm the topological transition between gapless phases. We show the breakdown of Lorentz invariance at this multi-critical point through the energy dispersion analysis. We also show that the scaling theories and curvature function renormalization group can also be effectively used to understand the topological quantum phase transitions between gapless phases. The model Hamiltonian which we study is more applicable for the system with gapless excitations, where the conventional concept of topological quantum phase transition fails.

23 pages (including appendices), 13 figures. Recently revised version with modified figures, additional references and discussions

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• Universal finite-size amplitude and anomalous entanglement entropy of $z=2$ quantum Lifshitz criticalities in topological chains
• Global entanglement in a topological quantum phase transition
• Coexistence of Strong and Weak Majorana Zero Modes in Anisotropic XY Spin Chain with Second-Neighbor Interaction
• Quantization of topological indices in critical chains at low temperatures
• Gapless higher-order topology and corner states in Floquet systems
• Topological physics in quantum critical systems
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• Deconfined criticality as intrinsically gapless topological state in one dimension
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• Quantum critical fans from critical lines at zero temperature
• Topology and edge modes surviving criticality in non-Hermitian Floquet systems
• Topologically nontrivial multicritical points