Accessing the topological Mott insulator in cold atom quantum simulators with realistic Rydberg dressing
Abstract
The interplay between many-body interactions and the kinetic energy gives rise to rich phase diagrams hosting, among others, interaction-induced topological phases. These phases are characterized by both a local order parameter and a global topological invariant, and can exhibit exotic ground states such as self-trapped polarons and interaction-induced edge states. In this work, we investigate a realistic scenario for the quantum simulation of such systems using cold Rydberg-dressed atoms in optical lattices. We consider spinless fermions on a checkerboard lattice, interacting via the tunable-range effective potential induced by the Rydberg dressing. We perform a detailed analysis of the phase diagram at half- and incommensurate fillings, in the mean-field approximation. We furthermore study the stability of the phases with respect to temperature within the mean-field approximation and with respect to quantum fluctuations using the density matrix renormalization group method. Finally, we propose an implementation protocol, and in particular identify attainable regimes of experimental parameters in which the topological properties of the model become accessible. Our work thereby opens a realistic pathway to the outstanding experimental observation of this predicted phase in state-of-the-art cold atom quantum simulators.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 07, 2023
- Source ID
- 10.1088/2058-9565/acbc45
Entities
People
- Alexandre Dauphin
- Lorenzo Cardarelli
- Maciej Lewenstein
- Markus Müller
- Sergi Julià-Farré
Organizations
- Agency for Administration of University and Research
- Army Research Office
- Departament d'Innovació, Universitats i Empresa, Generalitat de Catalunya
- Federal Ministry of Research, Technology and Space
- La Caixa
- Marie Skłodowska-Curie Actions
- Ministry of Science of Spain
- National Science Centre Poland