Scientists made light cross through gaps not in space, but time. The findings, published Monday in the journal Nature Physics, could lead to new, unusual ways to control light.
Scientists made light cross through gaps not in space, but time. The findings, published Monday in the journal Nature Physics, could lead to new, unusual ways to control light.
I agree with you : The only time travel that light does in here is to go forward in time and keeping information from the past, like any other physical phenomenon does.
… if this is so, then, one might ask, why would two photons separated in time create interference pattern with each other ?
Here my understanding is that light photons (or waves) are not punctual in time, but rather occupies a given span of time. Though they are very short, these two photons interfere because some of their span in time overlap.