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

^(b) xyin@physnet.uni-hamburg.de
^(c) lcao@physnet.uni-hamburg.de
^(d) pschmelc@physnet.uni-hamburg.de

Received: 1 March 2015
Accepted: 16 April 2015

Abstract

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.