dorsal/arxiv
View SchemaTwo-body correlation functions in nuclear matter with $np$ condensate
| Authors | A. A. Isayev |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0604028 |
| URL | https://arxiv.org/abs/nucl-th/0604028 |
| DOI | 10.1134/1.2161279 |
| Journal | JETP Lett.82:551-556,2005; Pisma Zh.Eksp.Teor.Fiz.82:627-632,2005 |
Abstract
The density, spin and isospin correlation functions in nuclear matter with a neutron-proton ($np$) condensate are calculated to study the possible signatures of the BEC-BCS crossover in the low-density region. It is shown that the criterion of the crossover (Phys. Rev. Lett. {\bf 95}, 090402 (2005)), consisting in the change of the sign of the density correlation function at low momentum transfer, fails to describe correctly the density-driven BEC-BCS transition at finite isospin asymmetry or finite temperature. As an unambiguous signature of the BEC-BCS transition, there can be used the presence (BCS regime) or absence (BEC regime) of the singularity in the momentum distribution of the quasiparticle density of states.
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"abstract": "The density, spin and isospin correlation functions in nuclear matter with a\nneutron-proton ($np$) condensate are calculated to study the possible\nsignatures of the BEC-BCS crossover in the low-density region. It is shown that\nthe criterion of the crossover (Phys. Rev. Lett. {\\bf 95}, 090402 (2005)),\nconsisting in the change of the sign of the density correlation function at low\nmomentum transfer, fails to describe correctly the density-driven BEC-BCS\ntransition at finite isospin asymmetry or finite temperature. As an unambiguous\nsignature of the BEC-BCS transition, there can be used the presence (BCS\nregime) or absence (BEC regime) of the singularity in the momentum distribution\nof the quasiparticle density of states.",
"arxiv_id": "nucl-th/0604028",
"authors": [
"A. A. Isayev"
],
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"nucl-th",
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"doi": "10.1134/1.2161279",
"journal_ref": "JETP Lett.82:551-556,2005; Pisma Zh.Eksp.Teor.Fiz.82:627-632,2005",
"title": "Two-body correlation functions in nuclear matter with $np$ condensate",
"url": "https://arxiv.org/abs/nucl-th/0604028"
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