论文标题
通过空腔光子统计数据直接测量原子纠缠
Direct measurement of atomic entanglement via cavity photon statistics
论文作者
论文摘要
我们提出了一个实验方案，用于测量两个两级原子之间的纠缠。我们的方案要求两个纠缠原子之一与空腔场相互作用，并且我们表明，通过测量腔场的零时间延迟二阶相干函数，可以测量任意钟形原子的双原子两分点状态的并发。由于我们的方案仅需要一个与测量腔相互作用的原子，因此纠缠量化变得独立于另一个原子的位置。因此，我们的计划对分布式量子系统中的纠缠定量具有重要意义。
We propose an experimental scheme for the measurement of entanglement between two two-level atoms. Our scheme requires one of the two entangled atoms to interact with a cavity field dispersively, and we show that by measuring the zero time-delay second-order coherence function of the cavity field, one can measure the concurrence of an arbitrary Bell-like atomic two-qubit state. As our scheme requires only one of the atoms to interact with the measured cavity, the entanglement quantification becomes independent of the location of the other atom. Therefore, our scheme can have important implications for entanglement quantification in distributed quantum systems.
