Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems. We explore this mechanism in a generalized Rice-Mele Fermi-Hubbard model characterized by the presence of competing onsite and intersite interactions. While large on-site repulsion leads to a breakdown of quantized pumping , sufficiently large intersite interactions allow for an interaction-induced recovery of Thouless pumps. The stable topological transport at large interactions is connected to the presence of a spontaneous bond-order-wave in the ground-state phase diagram of the model. We also discuss a concrete experimental setup based on ultracold magnetic atoms in an optical lattice.
The article can be found here: Quantum, the pre-print can be accessed here: arXiv
Various Scientific News
Category for scientific news not related to a particular group (E.g. single author papers).
PhD student Elena Poli is visiting the group of Professor Blair Blakie at Otago University in New Zealand
Our PhD student Elena is visiting for one month the group of Professor Blair Blakie at Otago University in New Zealand, as part of her DK-ALM research stay abroad. She is working with him to learn how to investigate elastic properties of supersolids!
Francesca wins Science Prize from Südtiroler Sparkasse Foundation
Südtiroler Sparkasse Foundation award ceremony – 24 January 2024
Francesca was awarded the Südtiroler Sparkasse Foundation’s Science Prize for exceptional research achievements on the 24th of January 2024 . These awards recognize outstanding scientific achievements by scientists working at the University of Innsbruck.
A Thouless pump with dipolar interactions
Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems. We explore this mechanism in a generalized Rice-Mele Fermi-Hubbard model characterized by the presence of competing onsite and intersite interactions. While large on-site repulsion leads to a breakdown of quantized pumping , sufficiently large intersite interactions allow for an interaction-induced recovery of Thouless pumps. The stable topological transport at large interactions is connected to the presence of a spontaneous bond-order-wave in the ground-state phase diagram of the model. We also discuss a concrete experimental setup based on ultracold magnetic atoms in an optical lattice.
The pre-print can be accessed here: arXiv
LFUI Guest Professorship granted
Luca Barbiero
Politecnico di Torino, Italy
Our group is very happy to announce that Dr. Luca Barbiero, currently Asssistent Professor at Politecnico di Torino, will visit us for a LFUI Guest Professorship for two months during October and November 2023. During his stay we will together work on new ideas on how to use our experimental dipolar platforms for the quantum simulation of Bose- and Fermi-Hubbard models with strong dipolar interactions. He will also give a special lecture on equilibrium and out-of-equilibrium properties of dipolar lattice systems to interested Master- and PhD-students.