Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Cold Atomic Gases and Superfluids
TT 9.1: Vortrag
Montag, 5. September 2022, 18:00–18:15, H23
Symmetry-protected Bose-Einstein condensation of interacting hardcore bosons — •Reja Wilke1, Thomas Köhler2, Felix Palm1, and Sebastian Paeckel1 — 1Department of Physics, Arnold Sommerfeld Center for Theoretical Physics, University of Munich, Germany — 2Department of Physics and Astronomy, Uppsala University, Sweden
We introduce a mechanism stabilizing a one-dimensional quantum many-body phase, characterized by a certain wave vector via the protection of an emergent Z2 symmetry. We illustrate this mechanism by constructing the solution of the full quantum many-body problem of hardcore bosons on a wheel geometry, which are known to form a Bose-Einstein condensate. The robustness of the condensate is shown numerically by adding nearest-neighbor interactions to the wheel Hamiltonian. We discuss further applications such as geometrically inducing finite-momentum condensates.