Quantum Entanglement And Squeezing In Bose-einstein Condensation Systems

This paper describes the significance and development of the Bose-Einstein condensat es (BEC). A nonlinear physical model is established to study the chaotic properties of the two-component BEC driven by periodic driven pules. We first study the trajectories in class-ical phase space for different parameters, and find the regions in phase space that correspond to regular and chaotic motions. Afterward, we use concurrence to study the quantum chaos, and find the intrinsic relationship between quantum chaos and entanglement. Finally, we intr oduce the spin squeezing parameters and quantum Fisher information, and explain their relat ions. We find that the squeezing parameters and quantum Fisher information can indicate qu antum chaos efficiently.