Group News (2013)5 December 2013|ilp SengstockHigh precission spectroscopy of ultracold Fermions in a triangular optical latticePhoto: AG SengstockFirst spectroscopic measurements using the ultra-stable clock laser have been performed on the doubly forbidden 1S0-3P0 transition. A sample of spin...31 July 2013|ilp SengstockGiant spin oscillations in an ultracold Fermi seaPhoto: AG SengstockCollective behavior in many-body systems is the origin of many fascinating phenomena in nature ranging from swarms of birds and modeling of human...10 July 2013|ilp SengstockMott insulator of Yb in a triangular optical latticePhoto: AG SengstockLast night we have observed the superfluid-to-Mott-insulator transition in a triangular optical lattice. The pictures show the vanishing visibility of...6 July 2013|ILP SengstockLarge-Amplitude Superexchange of High-Spin Fermions in Optical LatticesPhoto: AG SengstockWe show that fermionic high-spin systems with spin-changing collisions allow to monitor superexchange processes in optical superlattices with large...22 April 2013|ILP SengstockEngineering Ising-XY spin models in a triangular lattice via tunable artificial gauge fieldsPhoto: AG SengstockEmulation of gauge fields for ultracold atoms provides access to a class of exotic states arising in strong magnetic fields. Here we report on the...3 April 2013|ILP SengstockCluster Gutzwiller for bosons in optical latticesPhoto: AG SengstockBy treating clusters within the Gutzwiller theory, a surprisingly good description of quantum fluctuations beyond the mean-field theory is achieved...18 February 2013|ilp SengstockEngineering spin-waves in a high-spin ultracold Fermi gasPhoto: AG SengstockWe have studied in detail multi-component spin-waves in an s=3/2 Fermi gas where the high spin leads to novel tensorial degrees of freedom compared to...