Witnessing Multipartite Entanglement by Detecting Asymmetry

Entropy

Benjamin Yadin¹  Davide Girolami¹ 

[1] Department of Atomic and Laser Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK;

关键词: quantum information;    quantum coherence;    entanglement;    quantum metrology;   

DOI  :  10.3390/e19030124

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown