How did Gordey Lesovik and other researchers "reverse the arrow of time" using a quantum computer?

i have the vague idea that they made the little qbits in there basically do something in the reverse order that stuff like that normally happens, given stuff like entropy. like making that broken glass on the floor leap up and reassemble itself. all in spite of the enormous odds of that kind of thing happening spontaneously, and stuff

but seriously, nobody understands what these weird people are doing really. we just take their word for it don't we

https://www.independent.co.uk/life-style/gadgets-a...