Entanglement dynamics of photon pairs emitted from quantum dot

摘要

We present a model to derive the state of the photon pairs generated by thebiexciton cascade decay of a self-assembled quantum dot, which agrees well withthe experimental result. Furthermore we calculate the concurrence andentanglement sudden death is found in this system with temperature increasing,which prevents quantum dot emits entangled photon pairs at a high temperature.The relationship between the fine structure splitting and the sudden deathtemperature is provided too.