Multipartite Entanglement Detection via Structure Factors

Author(s)
Philipp Krammer, Hermann Kampermann, Dagmar Bruß, Reinhold Bertlmann, Leong Chuang Kwek, Chiara Macchiavello
Abstract

We establish a relation between entanglement of a many-body system and its diffractive properties, where the link is given by structure factors. Based on these, we provide a general analytical construction of multi-qubit entanglement witnesses. The proposed witnesses contain two-point correlations. They could be either measured in a scattering experiment or via local measurements, depending on the underlying physical system. For some explicit examples of witnesses we analyze the properties of the states that are detected by them. We further study the robustness of these witnesses with respect to noise.

Organisation(s)
Quantum Optics, Quantum Nanophysics and Quantum Information, Particle Physics
External organisation(s)
Heinrich-Heine-Universität Düsseldorf, National University of Singapore (NUS), Università degli studi di Pavia
Journal
Physical Review Letters
Volume
103
No. of pages
4
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.103.100502
Publication date
2009
Peer reviewed
Yes
Austrian Fields of Science 2012
1030 Physics, Astronomy
Portal url
https://ucrisportal.univie.ac.at/en/publications/multipartite-entanglement-detection-via-structure-factors(30bbecec-c663-4a5c-a035-943b7e6f41d9).html