dorsal/arxiv
View SchemaEffects of particle-number conservation on heat capacity of nuclei
| Authors | K. Esashika, H. Nakada, K. Tanabe |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0503066 |
| URL | https://arxiv.org/abs/nucl-th/0503066 |
| DOI | 10.1103/PhysRevC.72.044303 |
| Journal | Phys.Rev. C72 (2005) 044303 |
Abstract
By applying the particle-number projection to the finite-temperature BCS theory, the $S$-shaped heat capacity, which has recently been claimed to be a fingerprint of the superfluid-to-normal phase transition in nuclei, is reexamined. It is found that the particle-number (or number-parity) projection gives $S$-shapes in the heat capacity of nuclei which look qualitatively similar to the observed ones. These $S$-shapes are accounted for as effects of the particle-number conservation on the quasiparticle excitations, and occur even when we keep the superfluidity at all temperatures by assuming a constant gap in the BCS theory. The present study illustrates significance of the conservation laws in studying phase transitions of finite systems.
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"abstract": "By applying the particle-number projection to the finite-temperature BCS\ntheory, the $S$-shaped heat capacity, which has recently been claimed to be a\nfingerprint of the superfluid-to-normal phase transition in nuclei, is\nreexamined. It is found that the particle-number (or number-parity) projection\ngives $S$-shapes in the heat capacity of nuclei which look qualitatively\nsimilar to the observed ones. These $S$-shapes are accounted for as effects of\nthe particle-number conservation on the quasiparticle excitations, and occur\neven when we keep the superfluidity at all temperatures by assuming a constant\ngap in the BCS theory. The present study illustrates significance of the\nconservation laws in studying phase transitions of finite systems.",
"arxiv_id": "nucl-th/0503066",
"authors": [
"K. Esashika",
"H. Nakada",
"K. Tanabe"
],
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],
"doi": "10.1103/PhysRevC.72.044303",
"journal_ref": "Phys.Rev. C72 (2005) 044303",
"title": "Effects of particle-number conservation on heat capacity of nuclei",
"url": "https://arxiv.org/abs/nucl-th/0503066"
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