Abstract Submitted for the DAMOP17 Meeting of The American Physical Society Observation of topological states in an optical Raman lattice with ultracold fermions1

Submitted for the DAMOP17 Meeting of The American Physical Society Observation of topological states in an optical Raman lattice with ultracold fermions1 BO SONG, CHENGDONG HE, Hong Kong Univ of Sci & Tech, LONG ZHANG, TING FUNG JEFFREY POON, Peking University, ELNUR HAJIYEV, ZEJIAN REN, BOJEONG SEO, SHANCHAO ZHANG, Hong Kong Univ of Sci & Tech, XIONG-JUN LIU, Peking University, GYU-BOONG JO, Hong Kong Univ of Sci & Tech — The spin-orbit coupling with cold atoms, especially in optical lattices, provides a versatile platform to investigate the intriguing topological matters. In this talk, we will present the realization of one-dimensional spindependent lattice dressed by the periodic Raman field. Ultracold 173Yb fermions loaded into an optical Raman lattice reveal non-trivial spin textures due to the band topology, by which we measured topological invariants and determined a topological phase transition. In addition, we explored the non-equilibrium quench dynamics between the topological and the trivial states by suddenly changing the band topology of the optical Raman lattice. The optical Raman lattice demonstrated here opens a new avenue to study the spin-orbit coupling physics and furthermore to realize novel quantum matters such as symmetry-protected topological states. 1Funded by Croucher Foundation and Research Grants Council (RGC) of Hong Kong (Project ECS26300014, GRF16300215, GRF16311516, and Croucher Innovation grants); MOST (Grant No. 2016YFA0301604) and NSFC (No. 11574008) Bo Song Hong Kong Univ of Sci & Tech Date submitted: 24 Jan 2017 Electronic form version 1.4