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A: Fachverband Atomphysik

A 16: Symposium SAMOP Dissertation-Prize 2014 SYAD (with Q, MO, P)

A 16.2: Hauptvortrag

Dienstag, 18. März 2014, 11:00–11:30, Audimax

Quantum simulations with ultracold atoms: Beyond standard optical lattices — •Philipp Hauke — Institute of Quantum Optics and Quantum Information, Innsbruck, Austria

Many prominent problems of quantum many-body physics (such as high-Tc superconductivity or quark confinement) remain unsolved, because the exponential growth of Hilbert space prevents numerical treatment of more than a few particles. To solve such models, Feynman proposed thirty years ago to design quantum devices that are governed by the same equations as the abstract model. Ultracold atoms in optical lattices are -- thanks to their unprecedented cleanness and control -- ideal candidates for such "quantum simulators," and experiments that exceed the capabilities of classical computers are already being performed. In this talk, I present various new avenues that become open by going beyond standard setups, e.g., via exotic geometries, higher orbitals, or spin-dependent lattices. In particular, I discuss the exciting possibilities given by a periodical lattice driving, which allows us to explore frustrated quantum magnetism and which provides an alternative to light-induced synthetic gauge fields. Indeed, experiments along these lines are already being carried out. The proposed systems may realize topological phases, anomalous quantum-Hall states, or spin liquids, thus promising insight into some of the most important problems of condensed-matter and high-energy physics.