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While the engineering of static artificial magnetic fields in optical lattices opens up a new era of quantum simulation by using ultra-cold atoms, in this talk I will present some interesting dynamic phenomena induced by time-dependent artificial gauge fields. The first example is about the proposal for the realization of local magnetic flux insertion in optical lattices, which is based on the recent progress on the Floquet engineering of artificial magnetic fields as well as the ability of single-site addressing in quantum gas microscopes. We show that it can be employed to manipulate and probe elementary excitations of a topological Chern insulator. This includes quantized charge pumping along tailored paths inside the bulk, as well as the controlled population of edge modes. The other example is related to the protocols for adiabatic state preparation via magnetic flux ramps. Taking an interacting bosonic flux ladder as a minimal model, we show that the time required for adiabatic state preparation dramatically depends on the chosen pattern of vector potentials (in the form of Peierls phases). As an intriguing result, an optimal choice allows for preparing the ground state almost instantaneously in the non-interacting system, which can be related to the concept of counter-diabatic driving. Remarkably, we find extremely short preparation times also in the strongly-interacting regime. Our findings provide new possibilities for robust state preparation in atomic quantum simulators.
EDUCATION
• PhD candidate, 2017- 2021, Technical University of Berlin; Max Planck Institute for the Physics of Complex Systems, Dresden, Germany;
• Master of Science, 2013 - 2016, Department of Physics, Shanghai University, China;
• Bachelor Degree, 2009 - 2013, Department of Physics, Shanghai University, China.
RESEARCH TOPICS
• Artificial gauge fields and Topology in cold atoms;
• Quantum dynamical properties of quantum gases;
• Quantum phase transition.