A benchmark that does not transfer automatically to SYK

The supplied Hawk02-D derives this structure from its quadratic fermionic Hamiltonian, with

and gives the separate many-particle bound

CheungHawk02D. Those are comparison results for that Hamiltonian. A quadratic reduction of another model must be proved before these specific amplitudes can be used. The quartic source coupled to scalar fields need not preserve a one-particle sector, and no such reduction is established here.