dorsal/arxiv
View SchemaEntanglement Observables and Witnesses for Interacting Quantum Spin Systems
| Authors | L. -A. Wu, S. Bandyopadhyay, M. S. Sarandy, D. A. Lidar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412099 |
| URL | https://arxiv.org/abs/quant-ph/0412099 |
| DOI | 10.1103/PhysRevA.72.032309 |
| Journal | Phys. Rev. A 72, 032309 (2005) |
Abstract
We discuss the detection of entanglement in interacting quantum spin systems. First, thermodynamic Hamiltonian-based witnesses are computed for a general class of one-dimensional spin-1/2 models. Second, we introduce optimal bipartite entanglement observables. We show that a bipartite entanglement measure can generally be associated to a set of independent two-body spin observables whose expectation values can be used to witness entanglement. The number of necessary observables is ruled by the symmetries of the model. Illustrative examples are presented.
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"abstract": "We discuss the detection of entanglement in interacting quantum spin systems.\nFirst, thermodynamic Hamiltonian-based witnesses are computed for a general\nclass of one-dimensional spin-1/2 models. Second, we introduce optimal\nbipartite entanglement observables. We show that a bipartite entanglement\nmeasure can generally be associated to a set of independent two-body spin\nobservables whose expectation values can be used to witness entanglement. The\nnumber of necessary observables is ruled by the symmetries of the model.\nIllustrative examples are presented.",
"arxiv_id": "quant-ph/0412099",
"authors": [
"L. -A. Wu",
"S. Bandyopadhyay",
"M. S. Sarandy",
"D. A. Lidar"
],
"categories": [
"quant-ph",
"cond-mat.stat-mech",
"cond-mat.str-el"
],
"doi": "10.1103/PhysRevA.72.032309",
"journal_ref": "Phys. Rev. A 72, 032309 (2005)",
"title": "Entanglement Observables and Witnesses for Interacting Quantum Spin Systems",
"url": "https://arxiv.org/abs/quant-ph/0412099"
},
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