Can't travel through time

Single photon cannot pass the speed of light, just like Einstein's theory.

Hoping to travel through time is mentioned about 10 years ago, when scientists discovered the ability to travel faster than the surrounding light in some special environments.

However, a recent study by researchers from Hong Kong University of Science and Technology rejected this view when proving that single photons cannot overcome the speed of light, as Einstein's theory does. .

According to scientists at Hong Kong University of Science and Technology, single photons also follow the speed limit law and as such, time travel is not feasible in practice.

This finding also helps scientists better understand the process of quantum information transmission.