تقرير
Symmetry-broken perturbation theory to large orders in antiferromagnetic phases
| العنوان: | Symmetry-broken perturbation theory to large orders in antiferromagnetic phases |
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| المؤلفون: | Garioud, R., Šimkovic IV, F., Rossi, R., Spada, G., Schäfer, T., Werner, F., Ferrero, M. |
| المصدر: | Phys. Rev. Lett. 132, 246505 (2024) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We introduce a spin-symmetry-broken extension of the connected determinant algorithm [Phys. Rev. Lett. 119, 045701 (2017)]. The resulting systematic perturbative expansions around an antiferromagnetic state allow for numerically exact calculations directly inside a magnetically ordered phase. We show new precise results for the magnetic phase diagram and thermodynamics of the three-dimensional cubic Hubbard model at half-filling. With detailed computations of the order parameter in the low to intermediate-coupling regime, we establish the N{\'e}el phase boundary. The critical behavior in its vicinity is shown to be compatible with the $O(3)$ Heisenberg universality class. By determining the evolution of the entropy with decreasing temperature through the phase transition we identify the different physical regimes at $U/t\!=\!4$. We provide quantitative results for several thermodynamic quantities deep inside the antiferromagnetic dome up to large interaction strengths and investigate the crossover between the Slater and Heisenberg regimes. Comment: 13 pages, 10 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.132.246505 |
| URL الوصول: | http://arxiv.org/abs/2210.17423 |
| رقم الأكسشن: | edsarx.2210.17423 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.132.246505 |
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