Next Article in Journal
Packer Detection for Multi-Layer Executables Using Entropy Analysis
Next Article in Special Issue
On Hölder Projective Divergences
Previous Article in Journal
Variational Principle for Relative Tail Pressure
Previous Article in Special Issue
Information Geometric Approach to Recursive Update in Nonlinear Filtering
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Entropy 2017, 19(3), 124;

Witnessing Multipartite Entanglement by Detecting Asymmetry

Department of Atomic and Laser Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK
Author to whom correspondence should be addressed.
Academic Editor: Kevin H. Knuth
Received: 4 February 2017 / Revised: 8 March 2017 / Accepted: 12 March 2017 / Published: 16 March 2017
(This article belongs to the Special Issue Information Geometry II)
Full-Text   |   PDF [817 KB, uploaded 16 March 2017]   |  


The characterization of quantum coherence in the context of quantum information theory and its interplay with quantum correlations is currently subject of intense study. Coherence in a Hamiltonian eigenbasis yields asymmetry, the ability of a quantum system to break a dynamical symmetry generated by the Hamiltonian. We here propose an experimental strategy to witness multipartite entanglement in many-body systems by evaluating the asymmetry with respect to an additive Hamiltonian. We test our scheme by simulating asymmetry and entanglement detection in a three-qubit Greenberger–Horne–Zeilinger (GHZ) diagonal state. View Full-Text
Keywords: quantum information; quantum coherence; entanglement; quantum metrology quantum information; quantum coherence; entanglement; quantum metrology

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Girolami, D.; Yadin, B. Witnessing Multipartite Entanglement by Detecting Asymmetry. Entropy 2017, 19, 124.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top