Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 32: Ultra-cold plasmas and Rydberg systems (joint session A/Q)

Q 32.7: Vortrag

Mittwoch, 13. März 2019, 15:30–15:45, S HS 1 Physik

Experimental realization of a symmetry protected topological phase of interacting bosons with Rydberg atoms — Sylvain de Léséleuc¹, Vincent Lienhard¹, Pascal Scholl¹, Daniel Barredo¹, •Sebastian Weber², Nicolai Lang², Hans Peter Büchler², Thierry Lahaye¹, and Antoine Browaeys¹ — ¹Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, France — ²Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, University of Stuttgart, Germany

The paradigm of Landau symmetry breaking has proven very successful for characterizing phases of matter. However, not all phases follow this paradigm: some of them are characterized in the framework of topological phases, which is a powerful concept to characterize ground states of quantum many-body systems. While a few topological phases appear in condensed matter systems (such as quantum Hall states), a current challenge is the implementation and study of such phases in artificial matter. Here, we report the experimental realization of a symmetry protected topological phase of interacting bosons in a one-dimensional lattice, and demonstrate a robust ground state degeneracy attributed to protected edge states. The setup is based on atoms trapped in an array of optical tweezers and excited into Rydberg levels, which gives rise to hard-core bosons with an effective hopping by dipolar exchange interaction.