Table 1 Approximate ground and excited states energies for H2O in the sto-3g basis.

From: Reduction of the molecular hamiltonian matrix using quantum community detection

Excited state

\(E_{CL65}-E_{FCI}\) (kcal/mol)

\(E_{CL52}-E_{FCI}\) (kcal/mol)

0

0.05

0.68

1

0.06

0.19

2

0.09

0.49

3

0.02

0.51

4

0.04

33.15

5

0.13

17.07