Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-04-15
Nuclear Physics B 824 [FIS], 452-538 (2010)
Physics
Condensed Matter
Strongly Correlated Electrons
61 pages, 1 figure, published in Nuclear Physics B
Scientific paper
The momentum bands, energy dispersions, and velocities of the charge $c$ fermions and spin-neutral two-spinon $s1$ fermions of a square-lattice quantum liquid referring to the Hubbard model on such a lattice of edge length $L$ in the one- and two-electron subspace are studied. The model involves the effective nearest-neighbor integral $t$ and on-site repulsion $U$ and can be experimentally realized in systems of correlated ultra-cold fermionic atoms on an optical lattice and thus our results are of interest for such systems. Our investigations profit from a general rotated-electron description, which is consistent with the model global $SO(3)\times SO(3)\times U(1)$ symmetry. For the model in the one- and two-electron subspace the discrete momentum values of the $c$ and $s1$ fermions are good quantum numbers so that in contrast to the original strongly-correlated electronic problem their interactions are residual. The use of our description renders an involved many-electron problem into a quantum liquid with some similarities with a Fermi liquid.
No associations
LandOfFree
The square-lattice quantum liquid of charge c fermions and spin-neutral two-spinon s1 fermions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The square-lattice quantum liquid of charge c fermions and spin-neutral two-spinon s1 fermions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The square-lattice quantum liquid of charge c fermions and spin-neutral two-spinon s1 fermions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-653675