cpp

ISA, AA-VQC, and ADAPT-VQE Implementations

Iterated Sparse Approximation

• isa_main.cpp/hpp: This is the main script for running the ISA algorithm.
• simulator.cpp/hpp: This file contains functions for simulating the application of quantum gates to quantum states.
• state_tracker.cpp/hpp: This file is a wrapper around simulator.cpp/hpp and implements the iterative merging step for ISA.
• sp3.cpp/hpp: This file implements 3-qubit state preparation, which is the base case for 2-bit patterns (k=2).
• greedy.cpp/hpp: This file implements ISA for k=1.
• greedy3.cpp/hpp: This file implements ISA for k=2.
• pattern.cpp/hpp: This file implements the pattern data structure.

Alternating Ansatz - Variational Quantum Circuit

• vqc.cpp/hpp: This file implements gradient descent for AA-VQC based on this paper: https://arxiv.org/abs/2011.06258.
• vqc_main.cpp/hpp: This is the main script for running the AA-VQC algorithm.

Adaptive Derivative-Assembled Pseudo-Trotter ansatz Variational Quantum Eigensolver

• search.cpp/hpp: This file implements ADAPT-VQE based on this paper: https://www.nature.com/articles/s41467-019-10988-2.
• search_main.cpp/hpp: This is the main script for running the ADAPT-VQE algorithm.