Quantum Neural Networks Help


Hi, I was going through this paper : ArXiv 1806.06871 and the respective code and I was wondering why this (see below) happens.

Here the Dgate and the Kgate are applied to q[0] and that’s confusing to me as, if you notice, in both the paper and here , the two mode layer requires for the Dgate and the Kgate to be applied to both q[0] and q[1].

If anyone can clarify this, it would be really helpful. If this is a mistake, as I think it is, I’ll be happy to submit a PR changing it.

P.S Sorry for not posting links to the paper and the lines, I’m allowed only 2 links :confused:

Edit: I understand that the Dgate and the Kgate have been applied in the qnn_layer function but is there a reason they aren’t applied in the input layer?


Hi @RohitMidha23, it’s great that you’re taking a look at the fraud detection code and thanks for bringing this up!

You’re right, this is a typo and we originally envisaged the Dgate and Kgate to act on both q[0] and q[1] for the input layer of the QNN. However, the code in its current form matches the results in our paper and we therefore would prefer not to change the repo for now.

For your local version, feel free to change line 156 and 159 of the code so that q[0] goes to q[1].

Thanks, and let me know if anything else comes up!


I guess the same extends in the prediction file, testing.py too.

I noticed a few other small errors, I’ll post them here in a bit.

Also, out of curiosity, do you guys accept interns for XanaduAI? :slight_smile:



Thanks @RohitMidha23! Regarding interns - we are not seeking out new applicants at the moment, but things could always change in future.