dorsal/arxiv
View SchemaPhase Transitions in Generalised Spin-Boson (Dicke) Models
| Authors | Clive Emary, Tobias Brandes |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0401029 |
| URL | https://arxiv.org/abs/quant-ph/0401029 |
| DOI | 10.1103/PhysRevA.69.053804 |
| Journal | Phys. Rev. A 69, 053804 (2004) |
Abstract
We consider a class of generalised single mode Dicke Hamiltonians with arbitrary boson coupling in the pseudo-spin $x$-$z$ plane. We find exact solutions in the thermodynamic, large-spin limit as a function of the coupling angle, which allows us to continuously move between the simple dephasing and the original Dicke Hamiltonians. Only in the latter case (orthogonal static and fluctuating couplings), does the parity-symmetry induced quantum phase transition occur.
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"abstract": "We consider a class of generalised single mode Dicke Hamiltonians with\narbitrary boson coupling in the pseudo-spin $x$-$z$ plane. We find exact\nsolutions in the thermodynamic, large-spin limit as a function of the coupling\nangle, which allows us to continuously move between the simple dephasing and\nthe original Dicke Hamiltonians. Only in the latter case (orthogonal static and\nfluctuating couplings), does the parity-symmetry induced quantum phase\ntransition occur.",
"arxiv_id": "quant-ph/0401029",
"authors": [
"Clive Emary",
"Tobias Brandes"
],
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"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevA.69.053804",
"journal_ref": "Phys. Rev. A 69, 053804 (2004)",
"title": "Phase Transitions in Generalised Spin-Boson (Dicke) Models",
"url": "https://arxiv.org/abs/quant-ph/0401029"
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