SYNAPTIC CONNECTIONS. “When it is energetically favorable for the two neurons k and r to simultaneously be in the excited states, we shall call the synaptic connection excitatory in the energetic sense. Correspondingly, in the opposite case we refer to the connection as inhibitory. For the quantum field this translates as the interaction energy between the two modes k and j being negative (attractive) or positive (repulsive).”
https://onlinelibrary.wiley.com/doi/full/10.1002/prop.201800007?casa_token=GdPRXs_tGLEAAAAA%3Ag-pxPMtkcleTYDUNK3mYGfpEzKRyc2LqQknTgFFB7dkYFDL8rDe2s0f4_0Q0oKjXD4_AEgFPGWolVTQ