Fractional powers in QFT kinetic terms can be consistently formulated in Minkowski space using fakeon methods, yielding multiple inequivalent theories that match in Euclidean space, with standard identities preserved.
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Apparent exponential growth of metric perturbations in the Newtonian gauge for quadratic-gravity inflation is gauge-dependent and non-generic; other gauges remain well-behaved.
Causality is a misleading metaphysical concept that should be abandoned in fundamental physics, making renouncing microcausality acceptable for consistent quantum gravity theories such as those using fakeons.
citing papers explorer
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Fractions and Fakeons in Quantum Field Theory
Fractional powers in QFT kinetic terms can be consistently formulated in Minkowski space using fakeon methods, yielding multiple inequivalent theories that match in Euclidean space, with standard identities preserved.
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Gauge-independent approach to inflation in quadratic gravity
Apparent exponential growth of metric perturbations in the Newtonian gauge for quadratic-gravity inflation is gauge-dependent and non-generic; other gauges remain well-behaved.
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On Causality and Predictivity
Causality is a misleading metaphysical concept that should be abandoned in fundamental physics, making renouncing microcausality acceptable for consistent quantum gravity theories such as those using fakeons.