Hi Varsha,
I’m assuming you are looking into how one can define initial states for testing quantum circuits, and in particular your implementation of the HHL algorithm. Here’s a handy link to an introduction to the quantum computing toolbox:
This page covers basic implementations of qubits, quantum gates and quantum circuits. For an implementation of the HHL algorithm, I would suggest exploring solutions on the internet, as they would go more in-depth than anything the MATLAB documentation can provide.
I hope this helps,
Adit Kirtani.
