# Quantum Interference between Light Sources Separated by 150 Million Kilometers.

@article{Deng2019QuantumIB, title={Quantum Interference between Light Sources Separated by 150 Million Kilometers.}, author={Yu-Hao Deng and Hui Wang and Xing Ding and Zhao-Chen Duan and Jian Qin and M.-C. Chen and Yu Ming He and Yu-Ming He and Jin-Peng Li and Yu-Huai Li and Li-Chao Peng and Elisha S. Matekole and Tim Byrnes and Schneider and M. Kamp and Da-Wei Wang and Jonathan P. Dowling and Sven H{\"o}fling and Chaoyang Lu and Marlan O. Scully and Jian-Wei Pan}, journal={Physical review letters}, year={2019}, volume={123 8}, pages={ 080401 } }

We report an experiment to test quantum interference, entanglement, and nonlocality using two dissimilar photon sources, the Sun and a semiconductor quantum dot on the Earth, which are separated by ∼150 million kilometers. By making the otherwise vastly distinct photons indistinguishable in all degrees of freedom, we observe time-resolved two-photon quantum interference with a raw visibility of 0.796(17), well above the 0.5 classical limit, providing unambiguous evidence of the quantum nature…

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