Classical-hidden-variable description for entanglement dynamics of two-qubit pure states
| Autor: | L. S. Silveira, Renato M. Angelo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics FOS: Physical sciences Quantum entanglement Squashed entanglement 01 natural sciences Multipartite entanglement 010305 fluids & plasmas Quantum nonlocality Qubit Hidden variable theory 0103 physical sciences Probability distribution Statistical physics 010306 general physics Quantum Physics (quant-ph) Quantum |
| DOI: | 10.48550/arxiv.1704.02000 |
| Popis: | A hidden-variable model is explicitly constructed by use of a Liouvillian description for the dynamics of two coupled spin-1/2 particles. In this model, the underlying Hamiltonian trajectories play the role of deterministic hidden variables, whereas the shape of the initial probability distribution figures as a hidden variable that regulates the capacity of the model in producing correlations. We show that even though the model can very well describe the short-time entanglement dynamics of initially separated pure states, it is incapable of violating the Clauser-Horne-Shimony-Holt inequality. Our work suggests that, if one takes the reluctance of a given quantum resource to be emulated by a local-hidden-variable model as a signature of its nonclassicality degree, then one can conclude that entanglement and nonlocality are nonequivalent even in the context of two-qubit pure states. Comment: 8 pages, 2 figures, typos corrected, closer to the published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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