This code is written to complete the application procedure to QOSF program.

How to use the code?

To give a try, compile init.py script! The code consists of two main modules:

1. decomposition.py: includes some tools to find Pauli's decomposition of 'H' matrix.
2. vqe.py: is the main script where hybrid variational method is used to approximate the lowest eigenvalue.

Task 4

Find the lowest eigenvalue of the following matrix:

[[1, 0, 0, 0] [0, 0, -1, 0], [0, -1, 0, 0], [0, 0, 0, 1]]

using VQE-like circuits, created by yourself from scratch.