Syntactic Structure, Quantum Weights
Kentaro Imafuku
TL;DR
The paper argues that universal features of physics—local additive actions and exponential Euclidean weights—originate from minimal syntactic constraints on finite histories encoded as prefix-free, sequentially decodable programs. By showing that such syntax forces any continuous local descriptive cost into an Euler–Lagrange equivalence class and that exponential redundancy yields a Euclidean weight P[x] ∝ exp[−S_E[x]/ħ_eff], it reframes quantum weights as a structural consequence of description, not dynamics. The author then demonstrates that requiring the weight to be real and normalizable selects a real Euclidean representative, with OS positivity enabling a Lorentzian reconstruction when applicable. A cosmological calibration using holographic information content fixes ħ_eff to be of order ħ, linking microscopic quantum scales to the Universe’s global descriptive capacity. Overall, the work separates a universal syntactic layer (EL class and Euclidean weight) from system-specific semantic input (microscopic actions) and suggests a path toward understanding the Planck scale as a calibration outcome of cosmic information bounds.
Abstract
Why do local actions and exponential Euclidean weights arise so universally in classical, statistical, and quantum theories? We offer a structural explanation from minimal constraints on finite descriptions of admissible histories. Assume that histories admit finite, self-delimiting (prefix-free) generative codes that can be decoded sequentially in a single forward pass. These purely syntactic requirements define a minimal descriptive cost, interpretable as a smoothed minimal program length, that is additive over local segments. First, any continuous local additive cost whose stationary sector coincides with the empirically identified classical variational sector is forced into a unique Euler--Lagrange equivalence class. Hence the universal form of an action is fixed by descriptional structure alone, while the specific microscopic Lagrangian and couplings remain system-dependent semantic input. Second, independently of microscopic stochasticity, finite prefix-free languages exhibit exponential redundancy: many distinct programs encode the same coarse history, and this redundancy induces a universal exponential multiplicity weight on histories. Requiring this weight to be real and bounded below selects a real Euclidean representative for stable local bosonic systems, yielding the standard Euclidean path-integral form. When Osterwalder--Schrader reflection positivity holds, the Euclidean measure reconstructs a unitary Lorentzian amplitude.
