it could make our current computing technology exponentially more efficient, thus reducing the global power consumption of our data-driven society.

That’s a bold lie. Jevons paradox will apply and the first thing that will happen is building more AI data centers and crypto mining.

The gate here is really cool, I remember from my optical classes all the different ways to encode bits on a photon over fiber, I am curious which properties are more and less suitable for this application.