"My Equation and Other Poor Life Choices". "The Universe Is Confusing and So Is This Book" (en Inglés) - Daniel R.T. Green;Daniel Green

Most people imagine the universe beginning with a single, dramatic event - a "Big Bang" that burst everything into existence at once. But when you look at the universe through the lens of modern quantum theory, a very different picture emerges. Instead of a one‑time explosion, the universe looks more like a continuous unfolding, shaped moment by moment by the relationships between all the things inside it.

In this view, the universe isn't a static container or a stage where events happen. It's a relational quantum system - a web of interactions that evolves over time. And when you describe that evolution using the kind of equation physicists use to model open quantum systems, something interesting happens: you don't get a single beginning. You get ongoing change, gradual decoherence, and the slow emergence of the classical world we experience.

This is where the idea of an "infinite universe" comes in. It doesn't mean infinite space or endless physical size. It means something deeper: the universe has unbounded dynamical possibilities. Even if the cosmos is finite in extent, the number of ways its quantum state can evolve - the number of possible histories, outcomes, and branching pathways - is effectively limitless. The underlying quantum state can take on an enormous range of forms, and each interaction, each bit of decoherence, opens up new possibilities.

So the universe is "infinite" not because it stretches forever, but because its potential for evolution never runs out. The quantum rules that govern it allow for an open‑ended, ever‑unfolding tapestry of outcomes. Classical spacetime - the world of stars, planets, and people - emerges from this deeper process, not all at once, but gradually, as quantum possibilities settle into stable patterns.

In this picture, the universe isn't something that began and then coasts forward. It's something that is always becoming, shaped by the interplay of quantum dynamics and the relationships between all things. The richness of that process is what makes the universe feel infinite, even if its size is not.