تقرير
Universal probes for antiferromagnetic correlations and entropy in cold fermions on optical lattices
العنوان: | Universal probes for antiferromagnetic correlations and entropy in cold fermions on optical lattices |
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المؤلفون: | Gorelik, E. V., Rost, D., Paiva, T., Scalettar, R., Klümper, A., Blümer, N. |
المصدر: | Phys. Rev. A 85, 061602(R) (2012) |
سنة النشر: | 2012 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Condensed Matter - Strongly Correlated Electrons |
الوصف: | We determine antiferromagnetic (AF) signatures in the half-filled Hubbard model at strong coupling on a cubic lattice and in lower dimensions. Upon cooling, the transition from the charge-excitation regime to the AF Heisenberg regime is signaled by a universal minimum of the double occupancy at entropy s=S/(N k_B)=s*=ln(2) per particle and a linear increase of the next-nearest neighbor (NNN) spin correlation function for s |
نوع الوثيقة: | Working Paper |
DOI: | 10.1103/PhysRevA.85.061602 |
URL الوصول: | http://arxiv.org/abs/1201.5576 |
رقم الأكسشن: | edsarx.1201.5576 |
قاعدة البيانات: | arXiv |
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