Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.87: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

Doublon Formation by Ions Impacting a Strongly Correlated System — Karsten Balzer, •Niclas Schlünzen, Maximilian Rodriguez Rasmussen, and Michael Bonitz — CAU Kiel, Germany

Strongly correlated systems of fermions have a number of exciting collective properties. Among them, the creation of a lattice that is occupied by doublons, i.e. two fermions with opposite spins, offers interesting electronic properties. In the past a variety of methods has been proposed to control doublon formation both spatially and temporally. Here, a recently proposed^[1] mechanism is described and verified by computer simulations – doublon creation by the impact of energetic ions^[1,2]. The theoretical characterization is based on exact diagonalization calculations for small systems and is extended to larger systems via a Nonequilibrium Green Functions description^[3]. Finally, we present an idea how this concept can be realized with atoms in an optical lattice.
K. Balzer, M. Rasmussen, N. Schlünzen, M. Bonitz, submitted
K. Balzer, N. Schlünzen, M. Bonitz, Phys. Rev. B 94, 245118 (2016)
S. Hermanns, N. Schlünzen, M. Bonitz, Phys. Rev. B 90, 125111 (2014)