This sort of time flip has been described as looking into a mirror and spotting your back instead of your face…By carefully adjusting electronic components on a strip of metal, they introduced a sudden jump that reversed the direction of incoming signals…The outcome was a time-reversed copy of the original wave, appearing just as predicted but never before seen with clarity…A wave that can jump to a new frequency and then rewind might open new possibilities for data transmission at different ranges of the spectrum. It could also reshape how certain sensors and imaging systems are designed.
Reading that article just left me with more questions :/
And here are some answers:
https://www.eurekalert.org/news-releases/982119
(a) Conventional spatial reflections: A person sees their face when they look into a mirror, or when they speak the echo comes back in the same order. (b) Time reflections: The person sees their back when they look into a mirror, and they see themselves in different colors. They hear their echoes in a reversed order, similar to a rewound tape. © Illustration of the experimental platform used to realize time reflections. A control signal (in green) is used to uniformly activate a set of switches distributed along a metal stripline. Upon closing/opening the switches, the electromagnetic impedance of this tailored metamaterial is abruptly decreased/increased, causing a broadband forward-propagating signal (in blue) to be partially time-reflected, (in red) with all its frequencies converted. (Adapted from Nature Physics)
So kinda like running a sound wave through a flip/reverse filter in audacity and having it switch along the “time” axis.
Now that we have time crystals and time mirrors we will be able to create time lasers!
Don’t forget Time Cube!