Experimental characterization of photonic fusion using fiber sources
Experimental characterization of photonic fusion using fiber sources
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DOI：
10.1088/1367-2630/14/2/023021
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发表时间：
2012-02-08
影响因子：
3.3
通讯作者：
Rarity, J. G.
中科院分区：
文献类型：
--
作者：
Bell, B.;Clark, A. S.;Rarity, J. G.
我们报道了利用基于光纤的偏振分束器将来自两个独立光子晶体光纤源的光子融合成偏振纠缠态。对于最大纠缠Bell态，我们获得了高达F = 0.74 +/- 0.01的量子效率|φ（+）>使用5.3mW的低泵浦功率，具有每秒3.2次四倍检测的成功率。通过增加泵浦功率，我们发现每秒可以实现高达111.6四倍检测的成功率，并且在融合状态下仍然存在纠缠。我们通过提供一个完整的量子过程重建的融合操作的特点。在这里，我们开发了一个模型来描述纠缠的产生，包括不完美的主要原因，我们表明，这个模型符合实验结果。我们的工作显示了非理想设置如何限制融合的成功，提供了有关操作的实际要求的有用信息，该操作可用于在体和片上量子光子波导中构建大纠缠态。
We report on the fusion of photons from two independent photonic crystal fiber sources into polarization entangled states using a fiber-based polarizing beamsplitter. We achieve fidelities of up to F = 0.74 +/- 0.01 with respect to the maximally entangled Bell state |phi(+)> using a low pump power of 5.3 mW with a success rate of 3.2 fourfold detections per second. By increasing the pump power we find that success rates of up to 111.6 fourfold detections per second can be achieved, with entanglement still present in the fused state. We characterize the fusion operation by providing a full quantum process reconstruction. Here a model is developed to describe the generation of entanglement, including the main causes of imperfection, and we show that this model fits well with the experimental results. Our work shows how non-ideal settings limit the success of the fusion, providing useful information about the practical requirements for an operation that may be used to build large entangled states in bulk and on-chip quantum photonic waveguides.