Triple Entanglement in Neutron Interferometric and Polarimetric Experiments

Autor(en)

Stephan Sponar, Jürgen Klepp, Rudolf Loidl, Katharina Durstberger-Rennhofer, H. Geppert, Gerald Badurek, Helmut Rauch, Yuji Hasegawa

Abstrakt

Entanglement is a remarkable peculiarity in quantum mechanics. It occurs in quantum systems that consist of space-like separated parts, or in systems whose observables belong to disjoint Hilbert spaces. The latter is the case in single-neutron systems. Entangled states are renowned for exhibiting non-classical correlations between observables of individual sub-systems. In a perfect Si-crystal interferometer experiment entanglement between three degrees of freedom in a single-neutron system is created. The prepared entanglement of spin, path and energy is induced by interaction with an oscillating magnetic field. The generated Greenberger-Horne-Zeilinger (GHZ) state is analyzed with an inequality derived by Mermin, yielding a value M = 2:558(4) not less than or equal to 2, which exhibits a clear violation of the classical assumption. In addition observation of a GHZ entanglement, consisting of spin, momentum and total energy, in a neutron polarimetric experiment is presented. Here the advantages of neutron polarimetry, such as high contrast or insensitivity to ambient disturbances, are utilized resulting in final value of M = 3.936(2) not less than or equal to 2.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Technische Universität Wien

Journal

Journal of Physics: Conference Series

Band

340

Anzahl der Seiten

16

ISSN

1742-6588

DOI

https://doi.org/10.1088/1742-6596/340/1/012044

Publikationsdatum

2012

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0fa0bf59-5a1e-4e0f-a66d-fc73a4926093