Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 5: Quantum Gases: Bosons I
Q 5.2: Talk
Monday, March 23, 2015, 11:45–12:00, P/H2
Observation of entanglement dynamics in a one dimension optical lattice — •Sebastian Hild1, Jae-Yoon Choi1, Takeshi Fukuhara1, Peter Schauß1, Johannes Zeiher1, Immanuel Bloch1,2, and Christian Groß1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, Germany
Two component ultra cold bosonic gases in optical lattices are an excellent system to simulate quantum spin dynamics in Heisenberg chains. Near perfect initialization is achieved using a single component Mott insulating state where single site addressing techniques can be used to manipulate the local spin population. Quantum as well as thermal fluctuations cause a residual hole probability in the initial state and the impact on coherent spin transport is on open question. We experimentally show that coherent spin transport under these conditions is indeed possible. Propagation of a single spin impurity results in entanglement spreading along the spin chain which we directly detect by measuring the concurrence between pairs of lattice sites.