Depending on how this second beam splitter is configured, the photons are measured as either waves or particles. However, the study authors did a clever thing to their set-up and attempted to ...

Figure 1: The single-photon source. Figure 4: The probability that two photons that collide at the beam splitter leave in opposite directions, plotted as a function of interferometer delay offset ...

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 ...

A single control photon goes through a beam splitter where it gets the choice of going through the medium with a signal photon—the one we want to phase shift—or go through a separate channel.

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.

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.

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.

If, before impinging on the beam splitter, one photon is delayed in time with respect to the other by going through or being reflected by the sample, one can retrieve in real time the value of ...

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.