title: Selective distillation phenomenon in two-species Bose-Einstein condensates in open boundary optical lattices.
abstract: We investigate the formation of discrete breathers (DBs) and the dynamics of the mixture of two-species Bose-Einstein condensates (BECs) in open boundary optical lattices using the discrete nonlinear Schrödinger equations. The results show that the coupling of intra- and interspecies interaction can lead to the existence of pure single-species DBs and symbiotic DBs (i.e., two-species DBs). Furthermore, we find that there is a selective distillation phenomenon in the dynamics of the mixture of two-species BECs. One can selectively distil one species from the mixture of two-species BECs and can even control dominant species fraction by adjusting the intra- and interspecies interaction in optical lattices. Our selective distillation mechanism may find potential application in quantum information storage and quantum information processing based on multi-species atoms.
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Bai
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xiong
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Guo-Jian
authors.initials: GJ
authors.lastname: Yang
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Fu-Guo
authors.initials: FG
authors.lastname: Deng