title: Phase diagram and spin mixing dynamics in spinor condensates with a microwave dressing field.
abstract: Spinor condensates immersed in a microwave dressing field, which access both negative and positive values of the net quadratic Zeeman effect, have been realized in a recent experiment. In this report, we study the ground state properties of a spinor condensate with a microwave dressing field which enables us to access both negative and positive values of quadratic Zeeman energy. The ground state exhibits three different phases by varying the magnetization and the net quadratic Zeeman energy for both cases of ferromagnetic and antiferromagnetic interactions. We investigate the atomic-number fluctuations of the ground state and show that the hyperfine state displays super-Poissonian and sub-Poissonian distributions in the different phases. We also discuss the dynamical properties and show that the separatrix has a remarkable relation to the magnetization.
authors.affiliation: School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, 310023, China.
authors.forename: Yixiao
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Laboratory of Quantum Engineering and Quantum Materials, SPTE, South China Normal University, Guangzhou 510006, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhong
authors.affiliation: Department of Physics, Hangzhou Normal University, Hangzhou 310036, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Sun
authors.affiliation: School of Science, Jiangnan University, Wuxi 214122, China.
authors.forename: Zheng-Da
authors.initials: ZD
authors.lastname: Hu