期刊
ENTROPY
卷 19, 期 3, 页码 -出版社
MDPI AG
DOI: 10.3390/e19030124
关键词
quantum information; quantum coherence; entanglement; quantum metrology
资金
- EPSRC (UK) [EP/L01405X/1]
- Wolfson College, University of Oxford
- Engineering and Physical Sciences Research Council [EP/L01405X/1, 1814297] Funding Source: researchfish
- EPSRC [EP/L01405X/1] Funding Source: UKRI
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.
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