This paper is discussing transporting the memory/consciousness of a microorganism. These are stimulus/response creatures, whose "memory" contains a byte or two of information at most.
It has been estimated that the typical human consciousness contains 2.5 to 3 petabytes of information. that is 2.5 times 10 to the 15th power, or 2,500,000,000,000,000 bytes or 2,500 terabytes.
So, first we need to figure out how to actually access all of this information (the "download" alone could presumably take years for an individual), then someone needs to invent a quantum computer that lasts long enough to do anything with it.
As with many thought experiments in quantum physics, the purpose isn't actually to invent a working transporter. But exercises like this do sometimes lead to unexpected breakthroughs in other areas.
And then figure out a way to keep it from burning it self up.
The human brain processes untold commands yet the temperature never changes.
An amazing feat.....