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记者:能否介绍一下量子科学卫星工程的总体情况?潘建伟:量子科学实验卫星的想法由来已久,量子通信能否实用化还需要远距离实验来验证。国际上有很多团队都在研究,但当时主要集中在地面。去年,我们从原理上已经能够支持点对点五百公里的光纤量子通信。如果要达到更远的距离,我们还要付出更大的努力。2004年年底,我们验证了量子状态在穿越大气层的等效厚度之后还能很好地存活,也就是说我们发现上天这件事情是可以进
Reporter: Can you introduce the overall situation of Quantum Science Satellite Project? Pan Jianwei: The idea of quantum science experimental satellite has a long history, and whether the application of quantum communication is practical or not needs long-distance experiments to verify. There are many international teams are studying, but was mainly concentrated on the ground. Last year, we had been able to support fiber-optic quantum communication at a point-to-point distance of 500 kilometers in principle. If we want to reach further distances, we have to make greater efforts. At the end of 2004, we verified that the quantum state survived well after passing through the equivalent thickness of the atmosphere, that is to say that we found that this is a matter of God’s advance