We analyze a model problem representing multielectronic molecule sitting on metal surface. Working with reduced configuration interaction Hamiltonian, we show that one can extract very accurate ground state wave functions as compared numerical renormalization group theory (NRG)—even in the limit of weak metal-molecule coupling strength but strong intramolecular electron–electron repulsion. More...

background: rna molecules play many important regulatory, catalytic and structuralroles in the cell, and rna secondary structure prediction with pseudoknots is one themost important problems in biology. an rna pseudoknot is an element of the rna secondary structure in which bases of a single-stranded loop pair with complementary basesoutside the loop. modeling these nested structures (pseudokno...