In one embodiment of the present invention, a quantum entangled photon-pair producing device is disclosed which includes a superposed state generating device for generating a superposed state of photon-pairs entering through N (N≧2) different incident optical paths and being composed of photons having different polarization directions, and a light-guide device for separating the photon-pairs entering through the N (e.g. N is two) incident optical paths into photons having a first polarization direction (e.g. horizontally polarized light) and those having a second polarization direction (e.g. vertically polarized light) and guiding the photons having the first polarization direction and entering through the i-th (1≦i≦N) (e.g. the first) incident optical path and photons having the second polarization direction and entering through the (N−i+1) (e.g. the second) incident optical path to the i-th (e.g. the first) exit optical path through optical paths having the same optical path length. Therefore, quantum entangled photons of N channels having a quantum correlation with regard to the polarization direction can be produced. With this, a quantum entangled photon-pair producing device capable of producing quantum entangled photon-pairs of multi-channel having a quantum correlation with regard to the polarization direction with high production efficiency is realized.
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机译:在本发明的一个实施例中,公开了一种量子纠缠光子对产生装置,其包括叠加状态产生装置,用于产生通过N(N≥2)条不同入射光路进入的光子对的叠加状态,并且由具有不同偏振方向的光子,以及用于将通过N个入射光路(例如,N为两个)入射的光子对分离成具有第一偏振方向(例如水平偏振光)和具有第二偏振方向的光子的光导装置方向(例如垂直偏振光)并引导具有第一偏振方向并通过第i(1≤i≤N)(例如第一)入射光路进入的光子和具有第二偏振方向并通过(通过具有相同光程长度的光路到第i(例如第一)的N i + 1)(例如第二)入射光路。因此,可以产生关于偏振方向具有量子相关性的N个通道的量子纠缠光子。由此,实现了能够以高的生产效率产生关于偏振方向具有量子相关性的多通道的量子纠缠光子对的量子纠缠光子对产生装置。
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