Back to Search Start Over

Characterization of Topological States via Dual Multipartite Entanglement.

Authors :
Yu-Ran Zhang
Yu Zeng
Heng Fan
You, J. Q.
Nori, Franco
Source :
Physical Review Letters. 6/22/2018, Vol. 120 Issue 25, p1-1. 1p.
Publication Year :
2018

Abstract

We demonstrate that multipartite entanglement is able to characterize one-dimensional symmetry-protected topological order, which is witnessed by the scaling behavior of the quantum Fisher information of the ground state with respect to the spin operators defined in the dual lattice. We investigate an extended Kitaev chain with a Z symmetry identified equivalently by winding numbers and paired Majorana zero modes at each end. The topological phases with high winding numbers are detected by the scaling coefficient of the quantum Fisher information density with respect to generators in different dual lattices. Containing richer properties and more complex structures than bipartite entanglement, the dual multipartite entanglement of the topological state has promising applications in robust quantum computation and quantum metrology, and can be generalized to identify topological order in the Kitaev honeycomb model. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00319007
Volume :
120
Issue :
25
Database :
Academic Search Index
Journal :
Physical Review Letters
Publication Type :
Academic Journal
Accession number :
130366416
Full Text :
https://doi.org/10.1103/PhysRevLett.120.250501