Extending Wheeler's delayed-choice experiment to space.
Extending Wheeler's delayed-choice experiment to space.
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DOI:
10.1126/sciadv.1701180
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发表时间:
2017-10
期刊:
影响因子:
13.6
通讯作者:
Villoresi P
中科院分区:
文献类型:
--
作者:
Vedovato F;Agnesi C;Schiavon M;Dequal D;Calderaro L;Tomasin M;Marangon DG;Stanco A;Luceri V;Bianco G;Vallone G;Villoresi P
The quantum wave-particle duality of light is confirmed at the unprecedented distance of low-Earth-orbit satellites. Gedankenexperiments have consistently played a major role in the development of quantum theory. A paradigmatic example is Wheeler’s delayed-choice experiment, a wave-particle duality test that cannot be fully understood using only classical concepts. We implement Wheeler’s idea along a satellite-ground interferometer that extends for thousands of kilometers in space. We exploit temporal and polarization degrees of freedom of photons reflected by a fast-moving satellite equipped with retroreflecting mirrors. We observe the complementary wave- or particle-like behaviors at the ground station by choosing the measurement apparatus while the photons are propagating from the satellite to the ground. Our results confirm quantum mechanical predictions, demonstrating the need of the dual wave-particle interpretation at this unprecedented scale. Our work paves the way for novel applications of quantum mechanics in space links involving multiple photon degrees of freedom.
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