Running digital quantum simulations for spin and fermionic systems

We provide here a serie of Jupyter notebooks which serve as examples of qat.fermion capabilities.

• Spin-fermions transforms
• Variational Quantum Eigensolver for fermions
• Quantum Phase Estimation on the Hubbard molecule
• VQE for a H2 molecule using the UCC ansatz
• VQE for a LiH molecule using the UCC ansatz
• Advanced VQE: Quantum Subspace Expansion
• Natural gradient-based optimizer
• Optimizing circuits with the sequential optimization plugin
• Mitigating multiqubit gate noise
• Running several optimizations and keeping the best one with MultipleLaunchesAnalyzer