2014/11/15 by Xiang-Guo Yin, Xiangguo Yin, Yin, Xiangguo +4
Chemistry · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #Quantum optics and atomic interactions #Spectroscopy and Laser Applications #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.1411.4154
15 pages, 3 figures
arxiv created 2014/11/15 · openalex publication_date 2014/11/15 · arxiv updated 2014/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose an effective Ising spin chain constructed with dipolar quantum gases confined in a one-dimensional optical superlattice. Mapping the motional degrees of freedom of a single particle in the lattice onto a pseudo-spin results in effective transverse and longitudinal magnetic fields. This effective Ising spin chain exhibits a quantum phase transition from a paramagnetic to a single-kink phase as the dipolar interaction increases. Particularly in the single-kink phase,a magnetic kink arises in the effective spin chain and behaves as a quasi-particle in a pinning potential exerted by the longitudinal magnetic field. Being realizable with current experimental techniques, this effective Ising chain presents a unique platform for emulating the quantum phase transition as well as the magnetic kink effects in the Ising-spin chain and enriches the toolbox for quantum emulation of spin models by ultracold quantum gases.