Multipartite Entanglement Detection via Structure Factors

Autor(en)

Philipp Krammer, Hermann Kampermann, Dagmar Bruß, Reinhold Bertlmann, Leong Chuang Kwek, Chiara Macchiavello

Abstrakt

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(en)

Quantenoptik, Quantennanophysik und Quanteninformation, Teilchenphysik

Externe Organisation(en)

Heinrich-Heine-Universität Düsseldorf, National University of Singapore (NUS), Università degli studi di Pavia

Journal

Physical Review Letters

Band

103

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.103.100502

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/multipartite-entanglement-detection-via-structure-factors(30bbecec-c663-4a5c-a035-943b7e6f41d9).html