Multipartite entanglement measures and quantum criticality from matrix and tensor product states

Ching Yu Huang, Feng Li Lin

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36 Citations (Scopus)

Abstract

We compute the multipartite entanglement measures such as the global entanglement of various one- and two-dimensional quantum systems to probe the quantum criticality based on the matrix and tensor product states (MPSs and TPSs). We use the infinite time-evolving block decimation (iTEBD) method to find the ground states numerically in the form of MPSs and TPSs, and then evaluate their entanglement measures by the method of tensor renormalization group (TRG). We find that these entanglement measures can characterize the quantum phase transitions by their derivative discontinuity right at the critical points in all models considered here. We also comment on the scaling behaviors of the entanglement measures by the ideas of quantum-state renormalization group transformations.

Original languageEnglish
Article number032304
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume81
Issue number3
DOIs
Publication statusPublished - 2010 Mar 5

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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