Density Matrix Embedding: A Simple Alternative to Dynamical Mean-Field Theory
Density Matrix Embedding: A Simple Alternative to Dynamical Mean-Field Theory
We introduce density matrix embedding theory (DMET), a quantum embedding theory for computing frequency-independent quantities, such as ground-state properties, of infinite systems. Like dynamical mean-field theory, DMET maps the bulk interacting system to a simpler impurity model and is exact in the noninteracting and atomic limits. Unlike dynamical mean-field theory, …