Toward an accurate strongly coupled many-body theory within the equation-of-motion framework
Toward an accurate strongly coupled many-body theory within the equation-of-motion framework
Non-perturbative aspects of the quantum many-body problem are revisited, discussed and advanced in the equation of motion framework. We compare the approach to the two-fermion response function truncated on the two-body level by the cluster expansion of the dynamical interaction kernel to the approach known as time blocking approximation. Such …