交换路径-自旋粒子内纠缠到自旋-自旋粒子间纠缠
Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement
摘要：
基于一个使用分束器和自旋翻转器产生单个自旋1/2粒子（量子比特）的自旋和路径变量之间的纠缠的方案，我们制定了一个将这种粒子内混合纠缠转移到另外两个空间分离的自旋1/2粒子的自旋变量之间的粒子间纠缠的过程，这些粒子在整个过程中从未相互作用。这个纠缠交换的过程是通过马赫-曾德尔装置与斯特恩-格拉赫测量装置结合使用合适的幺正操作来完成的。因此，拟议的协议，使粒子内纠缠作为一种资源的使用-一个功能，仍然是未开发的。
英文摘要：
Based on a scheme that produces an entanglement between the spin and the path variables of a single spin-1/2 particle (qubit) using a beam-splitter and a spin-flipper, we formulate a procedure for transferring this intraparticle hybrid entanglement to an interparticle entanglement between the spin variables of two other spatially separated spin-1/2 particles which never interact with each other during the entire process. This procedure of entanglement swapping is accomplished by a Mach-Zehnder setup in conjunction with the Stern-Gerlach measuring device, using suitable unitary operations. The proposed protocol, thus, enables the use of intraparticle entanglement as a resource - a feature that has remained unexplored.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
