Group seminar at MPQ and Zoom: Topological quantum simulation in the momentum lattice

June 11, 2024

Dizhou Xie, University of Innsbruck, Austria
Group seminar at MPQ lecture hall and Zoom
Tuesday, June 11, 09:00am (MEZ)

In the first part of this report, I will give two topological quantum simulations work based on synthetic lattice.  
The first work is the study of the topological properties of extended SSH model - SSH4. We implement the SSH4 model in the momentum space lattice by using ultracold atoms. It is verified by experiments that the model's winding number can be obtained by the higher dimensional extension of the mean chiral displacement. The topological phase transition of the system is given experimentally, and the topological edge states are confirmed by quenching dynamics.
 The second work is the study of the topological properties of discrete time quantum walk. The topological quantum walk in discrete time is realized by using the ultracold atom in the momentum space lattice. The topological properties of the system are proved experimentally by measuring the time average chiral displacement . In addition, the interaction induced localization in quantum walk dynamics is also observed experimentally.
The above two works were completed during my PhD.
In the second part of this report, I will give the talk about experimental progress on the cavity-Yb-tweezer project in Innsbruck.

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