Coupling ghost modes to dissipative baths generates dynamically effective masses and widths that suppress Ostrogradsky instabilities above a critical coupling via bifurcated dissipative branches and a phase transition.
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Dissipative stabilization of Ostrogradsky modes in non-equilibrium field theory
Coupling ghost modes to dissipative baths generates dynamically effective masses and widths that suppress Ostrogradsky instabilities above a critical coupling via bifurcated dissipative branches and a phase transition.