Creating entangled photon pairs often requires intense excitation of nonlinear materials or the active manipulation of quantum devices. Now, entanglement between two photons has been created by scattering a laser off a passive quantum dot.

中文翻译：

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单个量子点被动地介导纠缠


创建纠缠光子对通常需要非线性材料的强烈激发或量子器件的主动操纵。现在，两个光子之间的纠缠是通过将激光从无源量子点散射而产生的。