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.
Witnessing multipartite entanglement by detecting asymmetry / Girolami, D.; Yadin, B.. - In: ENTROPY. - ISSN 1099-4300. - 19:3(2017), p. 124.
|Titolo:||Witnessing multipartite entanglement by detecting asymmetry|
|Data di pubblicazione:||2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/e19030124|
|Appare nelle tipologie:||1.1 Articolo in rivista|