Calendario Attività

Novel aspects of topological matter: from Floquet-engineering nodal-line semimetals to higher-order topological insulators for doublons

Categoria
Seminario
Data
7 Gennaio 2020 11:00 - 12:00
Luogo
14 - 15 IV piano St. 9
Affiliation
Universit? Libre de Bruxelles
Area di Ricerca
Transizioni di fase, Sistemi condensati e a molti corpi, Fisica Statistica e loro applicazioni

Over the last decades, topology has emerged as a novel paradigm in condensed matter physics. In the first part of the talk, I describe a scheme by which nodal rings and nodal spheres can be realized in synthetic quantum matter through well-defined periodic-driving protocols. As a central result in this approach, I characterize these topological defects through the quantum metric, which is a gauge-invariant quantity associated with the geometry of quantum states. In the second part of the talk, I introduce a novel framework by which genuine interaction-induced topological effects can be realized in quantum-engineered systems. This approach builds on the design of effective lattices for the center-of-mass motion of two-body bound states (doublons). This general scenario is illustrated on several examples, where higher-order topological corner modes emerge from genuine interaction effects. References: https://arxiv.org/abs/1912.00930 https://arxiv.org/abs/1911.05057

 
 

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