Non-Markovian Dynamics in Fiber Delay-line Buffers
arxiv(2024)
摘要
We study the non-Markovian effect on a two-photon polarization entangled
state in which one photon from the pair is stored in a fiber delay-line buffer.
We propose a model of a photonic qubit coupled to fiber birefringence and a
fiber reservoir representing the environment. We analytically derive a
non-Markovian probability function for the buffered photon and its paired
photon. To verify the probability function, we perform the full quantum state
tomography of the photon pairs. We further exploit the measures of quantum
mutual information for studying the quantumness of the buffered photon and its
paired photon. We find that Werner's well-known separability criterion occurs
at the buffer time of about 0.9ms. Furthermore, our result implies that the
non-zero quantum discord can surpass Werner's criterion, and hence the quantum
bi-partite correlation can exist for a buffer time greater than 0.9ms.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要