Energy entanglement in neutron interferometry
Abstract
Entanglement between degrees of freedom, namely between the spin, path and (total) energy degrees of freedom, for single neutrons is exploited. We implemented a triply entangled Greenberger-Horne-Zeilinger(GHZ)-like state and coherently manipulated relative phases of two-level quantum subsystems. An inequality derived by Mermin was applied to analyze the generated GHZ-like state: we determined the four expectation values and finally obtained M=2.558 +/- 0.004 which is clearly above the threshold of 2. This demonstrates the violation of a Mermin-like inequality for triply entangled GHZ-like state in a single-particle system, which, in turn, exhibits a clear inconsistency between noncontextual assumptions and quantum mechanics and confirms quantum contextuality.
Cite
@article{arxiv.1008.0794,
title = {Energy entanglement in neutron interferometry},
author = {Katharina Durstberger-Rennhofer and Yuji Hasegawa},
journal= {arXiv preprint arXiv:1008.0794},
year = {2015}
}
Comments
4 pages, 3 figures