Continuous phase transition without gap closing in non-Hermitian quantum many-body systems
Contrary to the conventional wisdom in Hermitian systems, a continuous quantum phase
transition between gapped phases is shown to occur without closing the energy gap Δ in …
transition between gapped phases is shown to occur without closing the energy gap Δ in …
A symmetry principle for topological quantum order
We present a unifying framework to study physical systems which exhibit topological
quantum order (TQO). The major guiding principle behind our approach is that of …
quantum order (TQO). The major guiding principle behind our approach is that of …
Entanglement entropy and the Berry phase in the solid state
S Ryu, Y Hatsugai - Physical Review B—Condensed Matter and Materials …, 2006 - APS
The entanglement entropy (von Neumann entropy) has been used to characterize the
complexity of many-body ground states in strongly correlated systems. In this paper, we try to …
complexity of many-body ground states in strongly correlated systems. In this paper, we try to …
Gapped quantum liquids and topological order, stochastic local transformations and emergence of unitarity
In this work, we present some new understanding of topological order, including three main
aspects.(1) It was believed that classifying topological orders corresponds to classifying …
aspects.(1) It was believed that classifying topological orders corresponds to classifying …
Topological entanglement entropy in the quantum dimer model on the triangular lattice
A characterization of topological order in terms of bi-partite entanglement was proposed
recently [A. Kitaev and J. Preskill, Phys. Rev. Lett. 96, 110404 (2006); M. Levin and X.-G …
recently [A. Kitaev and J. Preskill, Phys. Rev. Lett. 96, 110404 (2006); M. Levin and X.-G …
Fidelity approach to quantum phase transitions: finite-size scaling for the quantum Ising model in a transverse field
HQ Zhou, JH Zhao, B Li - Journal of Physics A: Mathematical and …, 2008 - iopscience.iop.org
We analyze the fidelity per lattice site for two different ground states of the one-dimensional
quantum Ising model in a transverse field near the critical point. It is found that, in the …
quantum Ising model in a transverse field near the critical point. It is found that, in the …
Symmetry, topology, duality, chirality, and criticality in a spin- XXZ ladder with a four-spin interaction
M Fontaine, K Sugimoto, S Furukawa - Physical Review B, 2024 - APS
We study the ground-state phase diagram of a spin-1 2 XXZ model with a chirality-chirality
interaction (CCI) on a two-leg ladder. This model offers a minimal setup to study an interplay …
interaction (CCI) on a two-leg ladder. This model offers a minimal setup to study an interplay …
Holographic symmetries and generalized order parameters for topological matter
We introduce a universally applicable method, based on the bond-algebraic theory of
dualities, to search for generalized order parameters in disparate systems including non …
dualities, to search for generalized order parameters in disparate systems including non …
Density-matrix renormalization group study of the extended Kitaev-Heisenberg model
We study an extended Kitaev-Heisenberg model including additional anisotropic couplings
by using the two-dimensional density-matrix renormalization group method. Calculating the …
by using the two-dimensional density-matrix renormalization group method. Calculating the …
High-dimensional fractionalization and spinon deconfinement in pyrochlore antiferromagnets
The ground states of Klein-type spin models on the pyrochlore and checkerboard lattice are
spanned by the set of singlet dimer coverings and thus possess an extensive ground-state …
spanned by the set of singlet dimer coverings and thus possess an extensive ground-state …