Analysis of the 3d massive renormalization group perturbative expansions: a delicate case
The effectiveness of the perturbative renormalization group approach at fixed space dimension d in the theory of critical phenomena is analyzed. Three models are considered: the O(N) model, the cubic model and the antiferromagnetic model defined on the stacked triangular lattice. We consider all mod...
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| Видавець: | Інститут фізики конденсованих систем НАН України |
|---|---|
| Дата: | 2010 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2010
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/32132 |
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| Цитувати: | Analysis of the 3d massive renormalization group perturbative expansions: a delicate case / B. Delamotte, M. Dudka, Yu. Holovatch, D. Mouhanna // Condensed Matter Physics. — 2010. — Т. 13, № 4. — С. 43703:1-16. — Бібліогр.: 61 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-321322012-04-10T12:19:07Z Analysis of the 3d massive renormalization group perturbative expansions: a delicate case Delamotte, B. Dudka, M. Holovatch, Yu. Mouhanna, D. The effectiveness of the perturbative renormalization group approach at fixed space dimension d in the theory of critical phenomena is analyzed. Three models are considered: the O(N) model, the cubic model and the antiferromagnetic model defined on the stacked triangular lattice. We consider all models at fixed d = 3 and analyze the resummation procedures currently used to compute the critical exponents. We first show that, for the O(N) model, the resummation does not eliminate all non-physical (spurious) fixed points (FPs). Then the dependence of spurious as well as of the Wilson-Fisher FPs on the resummation parameters is carefully studied. The critical exponents at the Wilson-Fisher FP show a weak dependence on the resummation parameters. On the contrary, the exponents at the spurious FP as well as its very existence are strongly dependent on these parameters. For the cubic model, a new stable FP is found and its properties depend also strongly on the resummation parameters. It appears to be spurious, as expected. As for the frustrated models, there are two cases depending on the value of the number of spin components. When N is greater than a critical value Nc, the stable FP shows common characteristic with the Wilson-Fisher FP. On the contrary, for N < Nc, the results obtained at the stable FP are similar to those obtained at the spurious FPs of the O(N) and cubic models. We conclude from this analysis that the stable FP found for N < Nc in frustrated models is spurious. Since Nc > 3, we conclude that the transitions for XY and Heisenberg frustrated magnets are of first order. 2010 Article Analysis of the 3d massive renormalization group perturbative expansions: a delicate case / B. Delamotte, M. Dudka, Yu. Holovatch, D. Mouhanna // Condensed Matter Physics. — 2010. — Т. 13, № 4. — С. 43703:1-16. — Бібліогр.: 61 назв. — англ. 1607-324X PACS: 75.10.Hk, 11.10.Hi, 12.38.Cy http://dspace.nbuv.gov.ua/handle/123456789/32132 en Condensed Matter Physics Інститут фізики конденсованих систем НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
The effectiveness of the perturbative renormalization group approach at fixed space dimension d in the theory of critical phenomena is analyzed. Three models are considered: the O(N) model, the cubic model and the antiferromagnetic model defined on the stacked triangular lattice. We consider all models at fixed d = 3 and analyze the resummation procedures currently used to compute the critical exponents. We first show that, for the O(N) model, the resummation does not eliminate all non-physical (spurious) fixed points (FPs). Then the dependence of spurious as well as of the Wilson-Fisher FPs on the resummation parameters is carefully studied. The critical exponents at the Wilson-Fisher FP show a weak dependence on the resummation parameters. On the contrary, the exponents at the spurious FP as well as its very existence are strongly dependent on these parameters. For the cubic model, a new stable FP is found and its properties depend also strongly on the resummation parameters. It appears to be spurious, as expected. As for the frustrated models, there are two cases depending on the value of the number of spin components. When N is greater than a critical value Nc, the stable FP shows common characteristic with the Wilson-Fisher FP. On the contrary, for N < Nc, the results obtained at the stable FP are similar to those obtained at the spurious FPs of the O(N) and cubic models. We conclude from this analysis that the stable FP found for N < Nc in frustrated models is spurious. Since Nc > 3, we conclude that the transitions for XY and Heisenberg frustrated magnets are of first order. |
| format |
Article |
| author |
Delamotte, B. Dudka, M. Holovatch, Yu. Mouhanna, D. |
| spellingShingle |
Delamotte, B. Dudka, M. Holovatch, Yu. Mouhanna, D. Analysis of the 3d massive renormalization group perturbative expansions: a delicate case Condensed Matter Physics |
| author_facet |
Delamotte, B. Dudka, M. Holovatch, Yu. Mouhanna, D. |
| author_sort |
Delamotte, B. |
| title |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| title_short |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| title_full |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| title_fullStr |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| title_full_unstemmed |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| title_sort |
analysis of the 3d massive renormalization group perturbative expansions: a delicate case |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2010 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/32132 |
| citation_txt |
Analysis of the 3d massive renormalization group perturbative expansions: a delicate case / B. Delamotte, M. Dudka, Yu. Holovatch, D. Mouhanna // Condensed Matter Physics. — 2010. — Т. 13, № 4. — С. 43703:1-16. — Бібліогр.: 61 назв. — англ. |
| series |
Condensed Matter Physics |
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2023-10-18T17:34:03Z |
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