Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Gases: Fermions I
Q 53.2: Vortrag
Donnerstag, 3. März 2016, 14:45–15:00, e001
Antiferromagnetic Heisenberg Spin Chain of a Few Cold Atoms in a One-Dimensional Trap — Simon Murmann1, •Frank Deuretzbacher2, Gerhard Zürn1, Johannes Bjerlin3, Daniel Becker4, Stephanie Reimann3, Luis Santos2, Thomas Lompe1, and Selim Jochim1 — 1Physikalisches Institut der Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg — 2Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover — 3Mathematical Physics and NanoLund, LTH, Lund University, SE-22100 Lund, Sweden — 4I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstr. 9, 20355 Hamburg
We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap [1]. These chains are stabilized by strong repulsive interactions between the two spin components without the need for an external periodic potential [2]. We independently characterize the spin configuration of the chains by measuring the spin orientation of the outermost particle in the trap and by projecting the spatial wave function of one spin component on single-particle trap levels. Our results are in good agreement with a spin-chain model for fermionized particles and with numerically exact diagonalizations of the full few-fermion system.
[1] S. Murmann et al., PRL 115, 215301 (2015)
[2] F. Deuretzbacher et al., PRA 90, 013611 (2014)