Ultrafast dynamics of strongly correlated fermions - a Nonequilibrium Green functions approach
14.10.2015 at 15:00
Motivated by exapnsion dynamics experiments with ultracold fermionic atoms in optical lattices we have developed computer simulations which I will present. They are based on Keldysh Green functions . Strong correlations are describe using T-matrix selfenergies . We are now able to treat more than 100 fermions in any dimension and investigate both the short-time and long-time behavior exactly. Extrapolation to the macroscopic limit allows to compare to the experimental results and reveals a surprisingly good agreement.
 K. Balzer, and M. Bonitz, "Nonequilibrium Green's Functions Approach to Inhomogeneous Systems", Lecture Notes in Physics, Springer, vol. 867 (2013)
 S. Hermanns, N. Schlünzen, and M. Bonitz, Phys. Rev. B 90, 125111 (2014)
 S. Hermanns, N. Schlünzen, M. Bonitz, and C. Verdozzi, arXiv:1508.02957
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