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We propose an effective Ising spin chain constructed with dipolar quantumgases confined in a one-dimensional optical superlattice. Mapping the motionaldegrees of freedom of a single particle in the lattice onto a pseudo-spinresults in effective transverse and longitudinal magnetic fields. Thiseffective Ising spin chain exhibits a quantum phase transition from aparamagnetic to a single-kink phase as the dipolar interaction increases.Particularly in the single-kink phase,a magnetic kink arises in the effectivespin chain and behaves as a quasi-particle in a pinning potential exerted bythe longitudinal magnetic field. Being realizable with current experimentaltechniques, this effective Ising chain presents a unique platform for emulatingthe quantum phase transition as well as the magnetic kink effects in theIsing-spin chain and enriches the toolbox for quantum emulation of spin modelsby ultracold quantum gases.

Magnetic Quantum Phases of Ultracold Dipolar Gases in an Optical Superlattice