Interacting spin-orbit- coupled spin-1 Bose-Einstein condensates
Authors: Sun K., Qu CL., Xu Y., Zhang YP., Zhang CW.
Autors Affiliation: Univ Texas Dallas, Dept Phys, Richardson, TX 75080 USA; Univ Trento, INO CNR BEC, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; OIST Grad Univ, Quantum Syst Unit, Onna, Okinawa 9040495, Japan
Abstract: The recent experimental realization of spin-orbit (SO) coupling for spin-1 ultracold atoms opens an interesting avenue for exploring SO-coupling-related physics in large-spin systems, which is generally unattainable in electronic materials. In this paper, we study the effects of interactions between atoms on the ground states and collective excitations of SO-coupled spin-1 Bose-Einstein condensates (BECs) in the presence of a spin-tensor potential. We find that ferromagnetic interaction between atoms can induce a stripe phase exhibiting in-phase or out-of-phase modulating patterns between spin-tensor and zero-spin-component density waves. We characterize the phase transitions between different phases using the spin-tensor density as well as the collective dipole motion of the BEC. We show that there exists a double maxon-roton structure in the Bogoliubov-excitation spectrum, attributed to the three band minima of the SO-coupled spin-1 BEC.
Journal/Review: PHYSICAL REVIEW A
Volume: 93 (2) Pages from: 023615-1 to: 023615-7
KeyWords: COLLOQUIUMDOI: 10.1103/PhysRevA.93.023615Citations: 42data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here