HAAD detects deepfakes by modeling latent manifolds as potential energy surfaces and quantifying instability via Hamiltonian trajectory statistics such as action and energy dissipation.
It is estimated via a lightweight MLP with a Softplus activation to keep the scaling positive for numerical stability: M−1(q) =Softplus(MLP(q)) +ϵ,(39) whereϵ= 10 −3
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Detecting Deepfakes via Hamiltonian Dynamics
HAAD detects deepfakes by modeling latent manifolds as potential energy surfaces and quantifying instability via Hamiltonian trajectory statistics such as action and energy dissipation.