Preprint
Aug 2026
Optimizing Subspace Expansion in Quantum Chemistry through Operator Selection and Reference State Choice
The Virtual Quantum Subspace Expansion (VQSE) extends the Variational Quantum Eigensolver (VQE) by leveraging additional measurements on the reference state to capture the influence of excluded virtual orbitals. This makes VQSE attractive for chemical applications where accurate energy differences along potential energ...
Konstantin Lamp, Alejandro D. Somoza, Elias Walter et al.
· 0 citations