Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 35: Nonequilibrium Quantum Many-Body Systems I (joint session TT/DY)

DY 35.11: Vortrag

Mittwoch, 14. März 2018, 12:30–12:45, H 3010

State engineering and out of equilibrium dynamics of spin models with cold bosonic atoms — •Araceli Venegas-Gomez and Andrew John Daley — University of Strathclyde, Glasgow, UK

The macroscopic control over cold atoms in optical lattices offers an excellent platform to study the out-of-equilibrium behaviour of strongly correlated systems, such as spin models, which are usually motivated by solid state physics. This offers us opportunities to study fundamental properties away from equilibrium and to probe states of the spin models, as well as providing tools to prepare states of lower temperature and entropy. We theoretically investigate a generalised Bose-Hubbard model for two-component bosonic atoms in an optical lattice, exploring the dynamics in corresponding spin-1/2 and spin-1 models. Investigating the magnetically ordered quantum states that can be engineered, we develop adiabatic state preparation techniques to achieve states with very low entropy starting from a known occupation number of particles per site. We explore this process, and ways to use non-equilibrium dynamics to probe the resulting states, using numerical methods based on tensor networks, focussing on parameters accessible in current experiments.