Rights statement: © 2011 American Physical Society
Final published version, 424 KB, PDF document
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 030401 |
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<mark>Journal publication date</mark> | 18/01/2011 |
<mark>Journal</mark> | Physical review letters |
Issue number | 3 |
Volume | 106 |
Number of pages | 4 |
Pages (from-to) | - |
Publication Status | Published |
<mark>Original language</mark> | English |
We study the thermodynamic properties of the 3D Hubbard model for temperatures down to the Neel temperature by using cluster dynamical mean-field theory. In particular, we calculate the energy, entropy, density, double occupancy, and nearest-neighbor spin correlations as a function of chemical potential, temperature, and repulsion strength. To make contact with cold-gas experiments, we also compute properties of the system subject to an external trap in the local density approximation. We find that an entropy per particle S/N approximate to 0.65(6) at U/t = 8 is sufficient to achieve a Neel state in the center of the trap, substantially higher than the entropy required in a homogeneous system. Precursors to antiferromagnetism can clearly be observed in nearest-neighbor spin correlators.