Magnetic kink states emulated with dipolar superlattice gases
1 Zentrum für Optische Quantentechnologien, Universität Hamburg - Luruper Chaussee 149, D-22761 Hamburg, Germany
2 The Hamburg Centre for Ultrafast Imaging - Luruper Chaussee 149, D-22761 Hamburg, Germany
Received: 1 March 2015
Accepted: 16 April 2015
We propose an effective Ising spin chain constructed with dipolar quantum gases confined in a one-dimensional optical superlattice. Mapping the motional degree of freedom of a single particle in the lattice onto a pseudo-spin results in an effective Ising type chain dressed with transverse and longitudinal magnetic fields. The ground state of this effective Ising chain changes from a paramagnetic to a single-kink state as the dipolar interaction increases. Particularly in the single-kink state this effective chain permits emulations of magnetic kink effects. Being realizable with current experimental techniques, this effective Ising chain presents a unique platform for emulations of Ising physics and enriches the toolbox for quantum emulation of spin models by ultracold quantum gases.
PACS: 67.85.-d – Ultracold gases, trapped gases / 75.10.Pq – Spin chain models
© EPLA, 2015