Yuan, Zhen-Sheng

Date:   Thursday, August 8, 2019
Time:   15:00
Place:   ETH Zurich, Hönggerberg, HPF G 6
Host:    T. Esslinger/F. Görg

Atomic spin entanglement and cooling in optical lattices

Zhen-Sheng Yuan
University of Science and Technology of China, China

In this talk, I will present our experimental progress on studying atomic spin entanglement/correlations with a spin-dependent optical superlattice. Atomic spins in the lattice are coherently manipulated by lasers, macrowaves, and magnetic fields with a spatial resolution of single lattice sites. Spin interactions of neighboring sites are created and we observe spin superexchange and ring exchange which are essential for multipartite entanglement and quantum topological matters. The spin-dependent lattice also opens an avenue to engineer the entropy in a quantum crystal for deep cooling in the Mott insulator regime. Moreover, it is favorable to study few-body physics by preparing Fock states of atoms and modulating interaction strength among the atoms.

References:
[1] H. -N. Dai, B. Yang, A. Reingruber, X.-F. Xu, X. Jiang, Y.-A. Chen, Z.-S. Yuan, J.-W. Pan. Generation and Detection of Atomic Spin Entanglement in Optical Lattices, Nature Physics 12, 783-787 (2016).
[2] Han-Ning Dai, Bing Yang, Andreas Reingruber, Hui Sun, Xiao-Fan Xu, Yu-Ao Chen, Zhen-Sheng Yuan, Jian-Wei Pan. Four-body ring-exchange interactions and anyonic statistics within a minimal toric-code Hamiltonian Nature Physics 13, 1195–1200 (2017).
[3] Bing Yang, Hui Sun, Chun-Jiong Huang, Han-Yi Wang, You-Jin Deng, Han-Ning Dai, Zhen-Sheng Yuan, Jian-Wei Pan. Staggered-immersion cooling of a quantum gas in optical lattices. arXiv:1901.01146 (2019).