Néel transition of lattice fermions in a harmonic trap: a real-space dynamic mean-field study
We study the magnetic ordering transition for a system of harmonically trapped ultracold fermions with repulsive interactions in a cubic optical lattice, within a real-space extension of dynamical mean-field theory. Using a quantum Monte Carlo impurity solver, we establish that antiferromagnetic cor...
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| Veröffentlicht in: | Physical review letters 2010-08, Vol.105 (6), p.065301-065301, Article 065301 |
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| container_end_page | 065301 |
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| container_issue | 6 |
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| container_title | Physical review letters |
| container_volume | 105 |
| creator | Gorelik, E V Titvinidze, I Hofstetter, W Snoek, M Blümer, N |
| description | We study the magnetic ordering transition for a system of harmonically trapped ultracold fermions with repulsive interactions in a cubic optical lattice, within a real-space extension of dynamical mean-field theory. Using a quantum Monte Carlo impurity solver, we establish that antiferromagnetic correlations are signaled, at strong coupling, by an enhanced double occupancy. This signature is directly accessible experimentally and should be observable well above the critical temperature for long-range order. Dimensional aspects appear less relevant than naively expected. |
| doi_str_mv | 10.1103/physrevlett.105.065301 |
| format | Article |
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| ispartof | Physical review letters, 2010-08, Vol.105 (6), p.065301-065301, Article 065301 |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | ANTIFERROMAGNETISM CALCULATION METHODS COMPUTERIZED SIMULATION CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CORRELATIONS COUPLING CRITICAL TEMPERATURE CRYSTAL LATTICES CRYSTAL STRUCTURE CUBIC LATTICES FERMIONS MAGNETISM MAGNETIZATION MEAN-FIELD THEORY MONTE CARLO METHOD NEEL TEMPERATURE PHYSICAL PROPERTIES SIMULATION SPACE THERMODYNAMIC PROPERTIES TRANSITION TEMPERATURE TRAPPING TRAPS |
| title | Néel transition of lattice fermions in a harmonic trap: a real-space dynamic mean-field study |
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