The Universe as an Optimal Quantum Information Encoding System

We propose that the Universe can be modeled as an optimal quantum information encoding system governed by a Minimum Quantum Description Length (MQDL) principle. The global quantum state is assumed to evolve along trajectories that extremize a description length functionalL[Ψ]=H(ρ)+λC[Ψ],where H(ρ) is von Neumann entropy and C[Ψ] is a complexity functional encoding structured correlations and entanglement. In this picture, quantum superposition becomes an optimal distributed encoding, decoherence appears as the breakdown of compressible encoding under environmental coupling, spacetime geometry emerges from entanglement structure, and gravity is reinterpreted as a gradient effect of information density. We outline several experimentally testable consequences, including gravity-enhanced decoherence, entanglement-dependent corrections to free fall, structured sub-thermal correlations in analogue Hawking radiation, and complexity-driven corrections to time dilation. This is an expanded and fully developed version of the original “MQDL Letter” (v1.0), including a detailed derivation of the Born rule (Appendix B) and a 2×2 density-matrix toy model for the H–C trade-off (Appendix C).