The Cosmic Metabolism Hypothesis

This paper proposes the Cosmic Metabolism Hypothesis, which regards our universe as an open system dynamically exchanging energy with a higher-dimensional background universe. This relationship can be metaphorically described as: "The hand of God drips a drop of thick soup (our universe) onto a test paper (the background universe)" -- upon contact, due to the density difference, the thick soup rapidly spreads across the test paper, forming complex yet orderly patterns. This initial density difference drives the entire evolutionary process.

The core mechanism of the theory is precisely this density-difference-driven bidirectional energy flow: in the early high-density state of the universe, energy (particularly antimatter) flows toward the lower-density background universe through an "osmotic pressure" effect, naturally explaining the observed baryon asymmetry (η ≈ 6.1×10^-10); in the late universe, energy flows from the background universe into our universe, manifesting as dark energy that drives accelerated cosmic expansion (w0 = -1.028±0.015). This process can be analogized to cellular metabolism -- the background universe acts as the "extracellular environment," while our universe serves as the "cell," maintaining its dynamic evolution through continuous matter-energy exchange.

The theory further reveals that: black holes, as high-density singularities, continuously erupt energy toward the background universe, constituting the cosmic "exhalation" mechanism; while the dark energy flow from the background universe constitutes the cosmic "inhalation" process. This respiratory energy cycle avoids the singularity problem. More importantly, the coupling energy continuously provided by the background universe causes the discrete spacetime of our universe to approach a "continuous" appearance, providing a natural bridge for the unification of quantum mechanics and general relativity -- the discreteness of quantum mechanics corresponds to the microstructure of our universe, while the continuity of general relativity stems from the "binding" effect of the background universe's energy flow.

This theory provides several unique, testable predictions:
- Dynamic dark energy equation of state w(z) exhibits damped oscillatory behavior and crosses w=-1 at redshift z≈0.7;
- Cosmic Microwave Background (CMB) shows a large-scale power suppression of approximately 0.1%;
- Baryon Acoustic Oscillation (BAO) scale exhibits characteristic modifications near z≈0.7;
- Black hole merger gravitational waves may carry "echo signals" from background universe energy exchange;
- Structure growth function exhibits non-standard evolution patterns.

Numerical simulations indicate that this theory is highly compatible with current observational data from Planck, DESI, etc., and shows potential for alleviating both the Hubble tension and S8 tension.

Keywords: Background universe, dark energy, baryon asymmetry, black hole singularity, dynamic dark energy, testable predictions, spacetime continuity, metabolism