Memory-based quantum repeater in quantum information communication

• 来源期刊: 中国物理（英文版）
• 关键词: quantum repeater photon buffer quantum information communication
• 年，卷（期）: 2004,（2）
• 页码范围: 173-177
• 页数: 5页
• 语种: 英文

摘要

This paper studies the quantum repeater in quantum information communication. We propose to introduce the photon buffer mechanism for storing photons, which uses fibre delay loops as photon memories and a programmable 1 × N switcher for distributing photon delay time. Meanwhile, we also consider entanglement purification and entanglement swapping restoration at an entanglement purification or entanglement swapping failure and introduce a protection link mechanism that allows the photonic quantum repeater of a broken connection to initiate a connection restoration process.