论文标题
在偶极纺纱液中的批判性增强的自旋旋转和纠缠
Critically-enhanced spin-nematic squeezing and entanglement in dipolar spinor condensates
论文作者
论文摘要
我们研究了量子临界效应增强的自旋纽扣挤压和量子Fisher信息（QFI）（QFI）中的Spin-1偶极原子玻色 - 因斯坦冷凝物。我们表明，量子相变可以改善附近关键点状态的压缩和QFI，并且可以获得海森堡有限的高精度计量学。通过计算确切的分析表达式，进一步分析了地面挤压和纠缠的不同特性。结果表明，可以获得稳定的挤压和纠缠，并且Bogoliubov近似可以很好地描述自旋纽扣挤压真空状态的动力学。
We study the quantum critical effect enhanced spin-nematic squeezing and quantum Fisher information (QFI) in the spin-1 dipolar atomic Bose-Einstein condensate. We show that the quantum phase transitions can improve the squeezing and QFI in the nearby regime of critical point, and the Heisenberg-limited high-precision metrology can be obtained. The different properties of the ground squeezing and entanglement under even and odd number of atoms are further analyzed, by calculating the exact analytical expressions.We also demonstrate the squeezing and entanglement generated by the spin-mixing dynamics around the phase transition point. It is shown that the steady squeezing and entanglement can be obtained, and the Bogoliubov approximation can well describe the dynamics of spin-nematic squeezed vacuum state.
