Entangled Photons from a Single Molecule, for Experiments on Single Emitters, Quantum Memories and Atomic Gases

这一提议旨在实现一种新的光子纠缠源。目标光源将解决目前可用光源的两个主要缺点：a)对近红外光子的限制和b)缺失的光谱叠加和原子量子存储器的对齐。这两个特性都可以通过使用来自单个发射器的单个光子，然后通过全光门将它们纠缠在一起来实现。虽然这两个部分的建议实现之前，他们的组合提出了许多挑战，实验者。最终的实现将允许产生的光子与原子蒸汽的光学相互作用，这可以实现量子存储器。或者，也可以是几个单发射器之间的光相互作用。我们相信，我们的新光子纠缠源可以在光谱亮度和通量方面优于或至少相当于现有的源，这些都在提案中进行了回顾。对光谱蓝色部分的频谱退化纠缠的扩展，扩展了可用量子存储器和固定量子比特的范围，用于未来的应用，如量子中继器。

This proposal aims to enable a novel source of photonic entanglement. The purposed source will address two main drawbacks of the presently available sources: a) the limitation to nearinfrared optical photons and b) the missing spectral superposition and alignment to an atomic quantum memory. Both features can be fulfilled by using single photons originating from a single emitter, and entangling them subsequently by an all-optical gate. Although both parts of the suggested implementation were realized before, their combination poses many challenges to the experimentalists. The final implementation will allow an optical interaction of the generated photons with atomic vapors, which can implement a quantum memory. Or, alternatively, an optical interaction among several single emitters. We believe, that our novel resource of photonic entanglement allows to be in terms of spectral brightness and flux superior, or at least equivalent, to the existing sources, which are all reviewed in the proposal. The extension to spectral degenerateentanglement in the blue part of the spectrum, extends the range of usable quantum memories and stationary qubits for future applications, such as quantum repeaters.