Powered by Indico
v3.2.3
Ultra-cold quantum gases are an ideal system to for generating scalable entangled states and simulating quantum many-body physics. Our pet systems are two-dimensional Bose-gases in optical lattices, which is well described by the Bose-Hubbard model. Resolving the densities and the full distribution functions and correlation functions can give detailed insight into the many body states and their non-equilibrium evolution.
In our experiment, by implementing spin-dependent superlattices, we realized bipartite addressing the system without using quantum gas microscope. First, we prepare a bosonic Mott state with unit filling. Afterwards, the atoms are loaded into these double-well arrays, and addressed by microwave transitions. By precisely tuning the Hubbard parameters, we engineer the effective spin-spin interactions [1,2], reduce the entropy of the state, prepare large amount of atomic pair entanglement [3], and simulating a Heisenberg antiferromagnet [4]. We conjecture that our experiments point to new possibilities in studying quantum many-body physics, such as non-equilibrium dynamics and lattice gauge theories.
These work are performed in collaboration with the group in Uni. Heidelberg.
[1] Generation and Detection of Atomic Spin Entanglement in Optical Lattices. Han-Ning Dai, Bing Yang, Andreas Reingruber, et. al. Nature Physics 12, 783–787 (2016).
[2] Four-body ring-exchange interactions and anyonic statistics within a minimal toric-code Hamiltonian. Han-Ning Dai, Bing Yang, Andreas Reingruber, et. al. Nature Physics 13, 1195–1200 (2017).
[3] Cooling and entangling ultracold atoms in optical lattices. Bing Yang, Hui Sun, Chun-Jiong Huang, et. al. arXiv:1901.01146. (accepted by Science)
[4] Realizing a bosonic Heisenberg antiferromagnet in optical lattices. Hui Sun, Bing Yang, Chun-Jiong Huang, et. al. (in preparation)
EDUCATION AND RESEARCH EXPERIENCE :
Since 2018.2 University of Science and Technology of China, Professor
2013.7-2018.2 Physikalisches Institut, University Heidelberg, Postdoc Fellow
2011.6-2013.6 University Heidelberg, CAS-DAAD Joint Fellowship
2007.9-2013.6 University of Science and Technology of China, Ph. D.
2003.9-2007.7 University of Science and Technology of China, B. S.
RESEARCH INTERESTS :
1. Quantum simulation with ultracold quantum gases / Quantum gas microscope
2. Time and frequency measurement / Optical lattices clock
Venue: TDLI Meeting Room 200
Here is the Zoom link if you prefer to join us remotely: