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Hindu groups said the 17th-Century mosque was built by Mughal emperor Aurangzeb on the partial ruins of the Kashi Vishwanath temple.

"With our experiment, we have disproved the previously valid assumption that multiphoton components would only impair visibility and can therefore be subtracted in the calculation," says Khodadad Kashi and continues: "We have discovered a new fundamental characteristic that was not considered in previous calculations. Our newly developed model can predict the quantum interference and we can measure this effect in an experiment."

"But the result would have been physically impossible," says Khodadad Kashi.

As the next step, Khodadad Kashi presented her theory and the experimental results at international conferences, including Photonics West in San Francisco, the world's largest specialist conference for optics and photonics, attracting around 22,000 participants.

"The findings could be important for quantum key distribution, which is necessary for secure communications in the future, specifically how quantum interference effects are interpreted for the generation of secret keys," says Khodadad Kashi.