Entanglement entropy bounds for pure states of rapid decorrelation
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917957425168384 |
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| author | Aizenman, Michael Warzel, Simone |
| author_facet | Aizenman, Michael Warzel, Simone |
| contents | For pure states of multi-dimensional quantum lattice systems, which in a convenient computational basis have amplitude and phase structure of sufficiently rapid decorrelation, we construct high fidelity approximations of relatively low complexity. These are used for a conditional proof of area-law bounds for the states' entanglement entropy. The condition is also shown to imply exponential decay of the state's mutual information between disjoint regions, and hence exponential clustering of local observables. The applicability of the general results is demonstrated on the quantum Ising model in transverse field. Combined with available model-specific information on spin-spin correlations, we establish an area-law type bound on the entanglement in the model's subcritical ground states, valid in all dimensions and up to the model's quantum phase transition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_10194 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Entanglement entropy bounds for pure states of rapid decorrelation Aizenman, Michael Warzel, Simone Quantum Physics Mathematical Physics 81P42, 81V70, 82B10 For pure states of multi-dimensional quantum lattice systems, which in a convenient computational basis have amplitude and phase structure of sufficiently rapid decorrelation, we construct high fidelity approximations of relatively low complexity. These are used for a conditional proof of area-law bounds for the states' entanglement entropy. The condition is also shown to imply exponential decay of the state's mutual information between disjoint regions, and hence exponential clustering of local observables. The applicability of the general results is demonstrated on the quantum Ising model in transverse field. Combined with available model-specific information on spin-spin correlations, we establish an area-law type bound on the entanglement in the model's subcritical ground states, valid in all dimensions and up to the model's quantum phase transition. |
| title | Entanglement entropy bounds for pure states of rapid decorrelation |
| topic | Quantum Physics Mathematical Physics 81P42, 81V70, 82B10 |
| url | https://arxiv.org/abs/2406.10194 |