I am looking for review articles and other online resources on qPCA based on Lloyd's original proposal. I have found the original source to be slightly hand-wavy with the details so I am having trouble filling in some gaps. In particular with regard to how the algorithm can even be implemented, say, using a program. Can someone help me finding sources to help me understand the work better? I am aware of this paper as a result of an answer to an earlier question. Are there any others?

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    $\begingroup$ Not sure this is what you are looking for but I put an implementation here. $\endgroup$
    – rhundt
    Commented Mar 26, 2023 at 21:46
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    $\begingroup$ Maybe also this scirate.com/arxiv/2302.14324 $\endgroup$
    – user34722
    Commented Mar 26, 2023 at 22:38

1 Answer 1


You may look at "Quantum Algorithm Implementations for Beginners" (ACM Transactions on Quantum Computing, Vol. 3, No. 4, Article 18) by Abhijith et al., p.59. Link: https://dl.acm.org/doi/10.1145/3517340

  • $\begingroup$ I have, but it is specific to an implementation on a 5-qubit machine. I would like to see a reference implementing the algorithm using the exponential swap gates as well. $\endgroup$ Commented Mar 29, 2023 at 17:12

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