Null-Cycle Origins (NCO): Deriving the Fundamental Acceleration Scale from a Zero-Energy Background

This manuscript introduces the Null-Cycle Origins (NCO) framework, a covariant scalar-tensor effective field theory that resolves the incompatibilities between General Relativity and Quantum Field Theory by anchoring the observable universe to a strict zero-energy thermodynamic bound. By modeling the cosmos as a macroscopic vacuum fluctuation undergoing a unitary Loop Quantum Cosmology bounce, the framework mathematically replaces particulate Dark Matter with an emergent topological strain tensor. Crucially, it formally derives the fundamental Modified Newtonian Dynamics acceleration scale directly from the Unruh-Gibbons-Hawking thermal floor of the vacuum. The framework is empirically validated against high-redshift galactic kinematics from the James Webb Space Telescope and the Atacama Large Millimeter Array, encapsulating rotational data with an unprecedented error margin of less than one percent. Furthermore, its pressureless defect geometry rigorously reproduces the Planck 2018 Cosmic Microwave Background acoustic peaks## MAJOR UPDATE updated section 2.6 (eq -59) from the previous version ( used standard Unruh-DeWitt transition -> category error)fixed using Euclidean QFT and the Matsubara formalism.