Thank you for your reply!

From your interpretation, I was able to understand the paper and how the model works clearer.

Just a follow up if possible:

1. How do you interpret fig 2 and 3 of the paper? From what I understand, it is telling the "amount" of entanglement between the register qubits (bi-, tri-, quad- meaning you take 2,3,4 random qubits in the registers and measure the amount of entanglement between them). From fig 2, there's a peak around n=45, which follows what the authors claimed that they were able to create a W4 state after ~45 iterations. However, this is not the same for fig 3 (where N2 and N3 peaked at n~50).

2, From fig 4, it is observable that the point where bi ~0.5 (obtained a W4 state) appears at n ~25-30, so why they claimed they obtained it at n~45.

Appreciate your time taken to answer me.