Spin Squeezing and Fixed-Point Bifurcation
HUANG Yi-Xiao;MA Jian;井晓幸;王晓光
【期刊名称】《理论物理通讯（英文版）》 【年(卷),期】2012(058)012
【摘要】We study spin squeezing and classical bifurcation in a nonfinear bipartite system. We show that the spin squeezing can be associated with a fixed-point bifurcation in the classical dynamics, namely, it acts as an indicator of the classical bifurcation. For the ground state of a system with coupled giant spins, we find that the spin squeezing achieves its minimum value near the bifurcation point. We also study the dynamics of the spin squeezing, for an initial state corresponding to one of the fixed point, we find that in the stable regime, the spin squeezing exhibits periodic oscillation and always persists except at some fixed times, while in the unstable regime, the periodic oscillation phenomenon disappears and the spin squeezing survives for a short time. Finally, we show that the mean spin squeezing, which is defined to be averaged over time, attains its minimum value near the bifurcation point.
【总页数】7页(800-806)
【关键词】固定点;压缩;自旋;分歧;耦合系统;周期振荡;经典动力学;分叉点 【作者】HUANG Yi-Xiao;MA Jian;井晓幸;王晓光
【作者单位】Zhejiang Institute of Modern Physics, Department of
Spin Squeezing and Fixed-Point Bifurcation
