dorsal/arxiv
View SchemaEntanglement in quantum critical spin systems
| Authors | Tommaso Roscilde, Paola Verrucchi, Andrea Fubini, Stephan Haas, Valerio Tognetti |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412056 |
| URL | https://arxiv.org/abs/quant-ph/0412056 |
Abstract
We study the field dependence of the entanglement of formation in anisotropic S=1/2 antiferromagnetic chains and two-leg ladders displaying a T=0 field-driven quantum phase transition. The analysis is carried out via Quantum Monte Carlo simulations. At zero temperature the entanglement estimators show abrupt changes at and around criticality, vanishing below the critical field, in correspondence with an exactly factorized state, and then immediately recovering a finite value upon passing through the quantum phase transition. At the quantum critical point, a deep minimum in the pairwise-to-global entanglement ratio shows that multi-spin entanglement is strongly enhanced; moreover this signature represents a novel way of detecting the quantum phase transition of the system, relying entirely on entanglement estimators.
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"date_created": "2026-03-02T18:02:12.974000Z",
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"abstract": "We study the field dependence of the entanglement of formation in anisotropic\nS=1/2 antiferromagnetic chains and two-leg ladders displaying a T=0\nfield-driven quantum phase transition. The analysis is carried out via Quantum\nMonte Carlo simulations. At zero temperature the entanglement estimators show\nabrupt changes at and around criticality, vanishing below the critical field,\nin correspondence with an exactly factorized state, and then immediately\nrecovering a finite value upon passing through the quantum phase transition. At\nthe quantum critical point, a deep minimum in the pairwise-to-global\nentanglement ratio shows that multi-spin entanglement is strongly enhanced;\nmoreover this signature represents a novel way of detecting the quantum phase\ntransition of the system, relying entirely on entanglement estimators.",
"arxiv_id": "quant-ph/0412056",
"authors": [
"Tommaso Roscilde",
"Paola Verrucchi",
"Andrea Fubini",
"Stephan Haas",
"Valerio Tognetti"
],
"categories": [
"quant-ph",
"cond-mat.str-el"
],
"title": "Entanglement in quantum critical spin systems",
"url": "https://arxiv.org/abs/quant-ph/0412056"
},
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"source": {
"execution_id": "a2024571-0858-42ac-aed0-54dd930ddf6f",
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