Abstract
The energy for the ground- and excited states of a system of two electrons interacting with two lattice sites is calculated exactly as a function of the electronic onsite- and intersite-correlation strength. A satisfactory agreement with the results of a variational method proposed recently is found. Results for systems up to 24 particles are presented.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have