Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Quantengase: Fermionen im Gitter

Q 22.6: Vortrag

Dienstag, 3. März 2009, 15:30–15:45, VMP 6 HS-A

Spin waves in spin-3/2 1D optical lattices — •Arturo Argüelles and Luis Santos — Leibniz Universität Hannover, D-30167 Hannover, Germany

The dynamics of the Hubbard Hamiltonian in 1D optical lattices is very rich. For instance, by taking only spinless particles, it is possible to observe how a hole can propagate throughout the lattice with a certain velocity. If additionally, the spin is taken into account it shows the spin-charge separation phenomenon. For higher spins, the super-exchange collisions allow the system to have several different spin-wave velocities and therefore one can see more general separation of the modes. Our calculations are performed using the Matrix Product State ansatz.