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13 papers · 1 filter
Symmetry protected topological orders in interacting bosonic systems
Xie Chen, Zheng-Cheng Gu, Zheng-Xin Liu +1
Symmetry protected topological (SPT) states are bulk gapped states with gapless edge excitations protected by certain symmetries. The SPT phases in free fermion systems, like topol…
Quantized topological terms in weak-coupling gauge theories with symmetry and their connection to symmetry enriched topological phases
Ling-Yan Hung, Xiao-Gang Wen
We study the quantized topological terms in a weak-coupling gauge theory with gauge group and a global symmetry in space-time dimensions. We show that the quantized…
Scaling of entanglement entropy across Lifshitz transitions
Marlon Rodney, H. Francis Song, Sung-Sik Lee +2
We investigate the scaling of the bipartite entanglement entropy across Lifshitz quantum phase transitions, where the topology of the Fermi surface changes without any changes in s…
The quasi-normal modes of quantum criticality
William Witczak-Krempa, Subir Sachdev
We study charge transport of quantum critical points described by conformal field theories in 2+1 spacetime dimensions. The transport is described by an effective field theory on a…
Projected Entangled Pair States at Finite Temperature: Imaginary Time Evolution with Ancillas
Piotr Czarnik, Lukasz Cincio, Jacek Dziarmaga
A projected entangled pair state (PEPS) with ancillas is evolved in imaginary time. This tensor network represents a thermal state of a 2D lattice quantum system. A finite temperat…
Characterizing topological order by studying the ground states of an infinite cylinder
Lukasz Cincio, Guifre Vidal
Given a microscopic lattice Hamiltonian for a topologically ordered phase, we describe a tensor network approach to characterize its emergent anyon model and, in a chiral phase, al…