VQEs

image credit “Jeremy Retamar Arrieta”

What are Variational Quantum Egiensolvers?

Variational quantum eigensolver (VQE) is a quantum algorithm that can be used to find the ground state energy of a Hamiltonian, as well as excited states of the Hamiltonian. The VQE algorithm is based on the variational principle, which seeks to find an ansatz (an approximation) to the ground state that has lower energy than the ground state itself. It has been shown that the VQE allows for universal quantum…