dorsal/arxiv
View SchemaEntanglement, chaos and atomic Wigner function of the Dicke model
| Authors | L. Sanz, K. Furuya |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0507025 |
| URL | https://arxiv.org/abs/quant-ph/0507025 |
Abstract
We calculate the atomic (spin) Wigner function for the single mode Dicke model in the regime of large number of two-level atoms. The dynamics of this quasi-probability function on the Bloch sphere allows us to visualize the consequences of the entanglement process between the boson and the spin subsystems. Such investigation shows a distinct localization behavior of the spin state with respect to the polar and azimuthal Bloch sphere angles. A complete {\em breakdown of reflection symmetry} in the azimuthal angle is shown in the non-integrable case, even at short evolution times. Also, in the classically chaotic situation, the appearance of {\em sub-planck structures} in the Wigner function is shown, and its evolution analyzed.
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"date_created": "2026-03-02T18:02:16.527000Z",
"date_modified": "2026-03-02T18:02:16.527000Z",
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"abstract": "We calculate the atomic (spin) Wigner function for the single mode Dicke\nmodel in the regime of large number of two-level atoms. The dynamics of this\nquasi-probability function on the Bloch sphere allows us to visualize the\nconsequences of the entanglement process between the boson and the spin\nsubsystems. Such investigation shows a distinct localization behavior of the\nspin state with respect to the polar and azimuthal Bloch sphere angles. A\ncomplete {\\em breakdown of reflection symmetry} in the azimuthal angle is shown\nin the non-integrable case, even at short evolution times. Also, in the\nclassically chaotic situation, the appearance of {\\em sub-planck structures} in\nthe Wigner function is shown, and its evolution analyzed.",
"arxiv_id": "quant-ph/0507025",
"authors": [
"L. Sanz",
"K. Furuya"
],
"categories": [
"quant-ph"
],
"title": "Entanglement, chaos and atomic Wigner function of the Dicke model",
"url": "https://arxiv.org/abs/quant-ph/0507025"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "38b77968-948a-4fb5-bd63-f69b12d00f72",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
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