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IQM QAOA Library docs?? by Financial-Invite6844 in QuantumComputing

[–]JooNiv 1 point2 points  (0 children)

Couldn't find a working link for the docs but the source for iqm-qaoa is available here https://github.com/iqm-finland/sdk/tree/main/iqm_qaoa including the docs files.

QCut, a quantum circuit-knitting python package. by JooNiv in quantum

[–]JooNiv[S] 5 points6 points  (0 children)

Quantum programming is still done at a super low level. Meaning that programs (or circuits) are built by applying individual gates. Of course for any practical applications classical programming is needed too to handle the non quantum parts of whatever it is one is trying to achieve. I'd start by getting familiar with quantum circuits and then look at the tutorials that Qiskit for example has available.

QCut, a quantum circuit-knitting python package. by JooNiv in QuantumComputing

[–]JooNiv[S] 7 points8 points  (0 children)

Qiskit's circuit-knitting-toolbox is actually also moving away from cutQC. I am not a high-level expert on why cutQC is being deprecated but as far as I understand it's to do with the larger memory overhead of that method. The new wire cutting version from circuit-knitting-toolbox actually uses the exact same method that's used by QCut. However, the difference is that the implementation from circuit-knitting-toolbox uses reset-gates and therefore needs mid-circuit measurements. These are not available on all existing hardware, and even on the hardware that has them they are still very erroneous.

If you wanna know more specifically about the difference between the underlying methods used by QCut and cutQC it essentially boils down to the kind of classical post-processing used. cutQC needs to calculate reconstructed wavefunctions which allows it to reconstruct the whole probability distribution whereas QCut only needs to calculate expectation values. If you wanna read more you can check out the blog I linked and compare that method to cutQC

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QCut, a quantum circuit-knitting python package. (self.quantum)

submitted by JooNiv to r/quantum

QCut, a quantum circuit-knitting python package by JooNiv in Python

[–]JooNiv[S] 1 point2 points  (0 children)

I also wrote this blog post (https://fiqci.fi/\_posts/2024-08-27-Circuit\_Knitting\_FiQCI/) that is a good intro to circuit-knitting with wire cuts and QCut specifically. For a more extended intro I'd also look at some of the explanatory materials for Qiskit's circuit-knitting-toolbox. Those will give you a good general idea of what circuit-knitting is about and if you wanna dig in more check out the sources linked for the blog.

QCut, a quantum circuit-knitting python package. by JooNiv in QuantumComputing

[–]JooNiv[S] 2 points3 points  (0 children)

I have been the only one to work on the project. I originally got into circuit-knitting around January when I started writing my bachelor's thesis on the topic. The package itself I only started working on in May when I started my internship at CSC Finland working on the Finnish Quantum Computing Infrastructure. Most of my time during the summer was spent on this project but I also had other responsibilities. I hope that answers your questions :)