HHL Algorithm for linear systems

[NicoRenaud]

https://en.wikipedia.org/wiki/Quantum_algorithm_for_linear_systems_of_equations https://arxiv.org/abs/0811.3171 https://qiskit.org/textbook/ch-applications/hhl_tutorial.html

[broekema]

For the March sprint:

• figure out for sure how HHL works for non-square matrices
• clarify the complexity of HHL

[jhidding]

https://arxiv.org/pdf/1802.08227.pdf

[jhidding]

http://dx.doi.org/10.1016/j.tcs.2016.05.044

[NicoRenaud]

A reminder that HHL (and other quantum algorithm) are not magic : https://scottaaronson.com/papers/qml.pdf Also published here : https://www.nature.com/articles/nphys3272

[NicoRenaud]

https://arxiv.org/pdf/1704.06174.pdf

[jhidding]

https://arxiv.org/pdf/1811.01726.pdf

[NicoRenaud]

A hybrid HHL that aims at very large 10^24 x 10^24 systems ! https://arxiv.org/pdf/2003.12770.pdf

[NicoRenaud]

See #31