Serdecznie zapraszamy 24 kwietnia 2023 r. o godzinie 12:15 na łączone Seminarium Enigmas of Chance i Atomic Optics Department pod tytułem Topological Properties of Dipolar Quantum Simulators, które wygłosi dr Luca Barbiero z Institute of Photonic Sciences, Barcelona, Hiszpania. Seminarium odbędzie się wyłącznie na grupie MS Teams ZOA-test.
Abstrakt
Quantum simulators made of magnetic atoms allow to investigate intriguing topological states of matter. In the case of bosonic atoms we show that the combination of topology and quantum criticality can give rise to an exotic mix of counterintuitive effects. In particular, we reveal the presence of two distinct topological quantum critical points with localized edge states and gapless bulk excitations. Our results demonstrate that the topological critical points always separate two phases, one topologically protected and the other topologically trivial, both characterized by a long-range ordered string correlation function. In the case of fermionic dipolar quantum simulators, we uncover a topological sector which remained elusive in previous finite-size numerical studies due to boundary effects. We first show that, for an infinite system, the bond order wave regime is characterized by two degenerate bulk states corresponding to the trivial and topological sectors. At the same time, for finite size systems, we show that the topological sector can be stabilized by imposing a suitable border potential. Finally I will discuss how all such topological orders can be detected with a quantum gas microscope
It takes place physically SOLELY on the ZOA-test MS Teams group and can be conveniently joined under the link: https://bit.ly/30CvdPV.