物理
量子纠缠
比克西顿
光子纠缠
量子点
光子
原子物理学
极化(电化学)
激子
斯塔克效应
同意
激发
量子力学
级联
量子光学
激光器
量子
谱线
化学
物理化学
色谱法
作者
Francesco Basso Basset,Michele B. Rota,Mattia Beccaceci,T. M. Krieger,Quirin Buchinger,Julia Neuwirth,Hêlio Huet,Sandra Stroj,Saimon Filipe Covre da Silva,Giuseppe Ronco,Christian Schimpf,Sven Hoefling,Tobias Huber‐Loyola,Armando Rastelli,Rinaldo Trotta
标识
DOI:10.1103/physrevlett.131.166901
摘要
Two-photon resonant excitation of the biexciton-exciton cascade in a quantum dot generates highly polarization-entangled photon pairs in a near-deterministic way. However, the ultimate level of achievable entanglement is still debated. Here, we observe the impact of the laser-induced ac-Stark effect on the quantum dot emission spectra and on entanglement. For increasing pulse-duration-to-lifetime ratios and pump powers, decreasing values of concurrence are recorded. Nonetheless, additional contributions are still required to fully account for the observed below-unity concurrence.
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