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从2002年起，蔡林格就一直在跟欧洲空间局交涉，想将一台纠缠光子源送上国际空间站，让他能够向地面发射纠缠光子。他们没有拒绝，只是说时机未到。蔡林格说，美国宇航局（NASA）在2012年组织了一次会议，召集量子物理学家与NASA的空间科学家会面，曾有传言说，他们有意支持一项实验但然后就没有然后了
所以量子通信在可預見的將來是根本不可能實現的
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To track the OGS more reliably with this coarse pointing, the laser beam divergence was widened, and brighter
laser pulses (on the order of 10^8 photons per pulse at the exit of the SOTA, Table 1) than those required in QKD were used, although the optical signals received at the entrance of the OGS were photon-limited in the range of ∼ 0.145– 6.696 photons per pulse.
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