Description

1. Answer each of the following in one sentence, using words only.
(a) Define canonical Hartree-Fock orbitals.
(b) Explain why the choice of Hartree-Fock orbitals is not unique.
2. Expand apaqa†sa†r as a linear combination of strings which are in normal order. Identify the vacuum expectation value of this operator product.
= ?

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