The collectivity of light-matter coupling can also facilitate a different arrangement of charge transfer reaction, a so-called "super-reaction" as shown in Fig. , adapted from Ref. 436. In this reaction, several donor molecules are coupled to a single acceptor molecule (Fig. ). This arrangement allows charge from any of the donors to transfer to the acceptor molecule, which allows for an increase in rate as N becomes larger. In particular, the donor-acceptor coupling in the matter Hamiltonian has the form ) and the coupling between the upper polariton and the acceptor state at resonance is