Entanglement between external degrees of freedom of atoms via Bragg deflection

Quantum Nondemolition State Measurement via Atomic Scattering in Bragg Regime

We suggest a quantum nondemolition scheme to measure a quantized cavity field state using scattering of atoms in general Bragg regime. Our work extends the QND measurement of a cavity field from Fock state, based on first order Bragg deflection [9], to any quantum state based on Bragg deflection of arbitrary order. In addition a set of experimental parameters is provided to perform the experiment within the frame work of the presently available technology.

利用布拉格衍射超纠缠原子的超密编码

Superdense Coding using Bragg Diffracted Hyperentangled Atoms

本文提出利用腔QED中布拉格衍射生成的超纠缠原子实现超密编码，使Alice通过单个超纠缠原子传输2比特经典信息，并借助多自由度增强编码信息的安全性。

原子干涉暗物质探测中的时钟跃迁与布拉格衍射对比

Clock Transitions Versus Bragg Diffraction in Atom-interferometric Dark-matter Detection

本研究对比原子干涉暗物质探测中时钟跃迁与布拉格衍射机制，分析暗物质对原子内态和运动的不同作用及耦合规律，为地面暗物质探测器的设计与优化提供理论参考。

Testing the Universality of Free Fall at ${10^{ - 10}}$ level by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction

We have performed a precision atomic interferometry experiment on testing the universality of free fall (UFF) considering atoms' spin degree of freedom. Our experiment employs the Bragg atom interferometer with $^{87}$Rb atoms either in hyperfine state $\left| {F = 1,{m_F} = 0} \right\rangle $ or $\left| {F = 2,{m_F} = 0} \right\rangle $, and the wave packets in these two states are diffracted in one pair of Bragg beams alternatively, which can help suppress the common-mode systematic errors. We have obtained an E$\rm{\ddot{o}}$tv$\rm{\ddot{o}}$s ratio $η= \left( { 0.9 \pm 2.7} \right) \times …

利用双能级中性原子超纠缠对进行纠缠交换

Entanglement Swapping Using Hyperentangled Pairs of Two-Level Neutral Atoms

本文提出基于原子布拉格衍射的中性原子超纠缠交换方案，利用叠加态腔与双能级辅助原子实现确定性、高保真且抗退相干的量子信息传输，并给出实验参数验证可行性。