A few possibilities come to mind…
- Inflation starts when the inflation field’s energy density dominates the total energy density of the universe.
- The inflation field must control the expansion dynamics while obeying the slow-roll conditions long enough to solve the horizon and flatness problems.
- Inflation must end in the right way. (Before it exceeds the tipping point of the runaway mass/energy ratio). Stop now, or oblivion will set in. Note: it already built The correct stopping point into the system.
- The universe’s initial inflation solves the density problem at the Big Bang’s start-up after reaching critical density. The density needed for life, the critical density, and the achieved density are all perfectly aligned. The anthropic requirements have started.
- In physical cosmology, cosmic inflation, cosmological inflation, or just inflation is the theory of the exponential expansion of space in the early universe. This expansion’s acceleration due to dark energy began after the universe was already over 9 billion years old.
- With no physical inflation model, the necessary coupling between inflation and ordinary matter/radiation still had to occur. Inflation must cause the universe to be almost homogeneous in able to set up minor, high-density irregularities. These homogeneities will grow via gravitational instability to form cosmic structures. They have tuned these inflationary dials to cause the universe’s expansion rate to accelerate briefly. Inflation needs to produce a large number of e-folds to ensure expansion smoothness.
- Without fine-tuning, the gas would never condense into gravitationally bound structures at all. The universe would forever remain dark and featureless, even if the initial mix of atoms, dark energy, and radiation were the same as our own. If large-amplitude waves replaced our initial ripples, turbulent violence would prevail. Giant galaxies would condense early on; there would be no stars. Instead, they would collapse into vast black holes. The few stars that could form would be too tightly packed together with no stable planetary systems.
- Gravitational waves transport energy as gravitational radiation, a form of radiant energy similar to electromagnetic radiation.
- Gravitational waves are disturbances in spacetime’s curvature, generated by sped-up masses that propagate as waves outward from their source at the speed of light. Gravitational waves transport energy as gravitational radiation, a form of radiant energy similar to electromagnetic radiation.
