Diamond exchanges Here BS stands for beam splitter and SW stands for ideal switches. In the transmission channel, the photon is accessible to Eve. (Courtesy: Salih et al./Phys. Rev. Lett.) The second ...

Depending on how this second beam splitter is configured, the photons are measured as either waves or particles. However, the ...

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But if a second (output) beam splitter is added, even after the photon has passed the first beam splitter, the photon will act like a wave and seemingly take both paths. Credit: M. Telfer.

Researchers have taken a famous quantum-physics experiment to new heights by sending light, in the form of photons, to space and back, demonstrating the dual-particle-wave nature of light over ...

Two-photon interference, also known as the Hong-Ou-Mandel effect, occurs when two identical photons enter a beam splitter from different input ports but exit together out of the same output port.

Simply put, if you apply a global phase change to one beam relative to another when incident on an ordinary beamsplitter, it will change the time of arrival of the photon.