Quantum Bounce: A Universe Without Singularity ⚡ экспресс
Scientists looked at how a closed universe could avoid a catastrophic crunch into a single point. Using quantum theory, they described a "Big Bounce"—like a pendulum that, after reaching its far point, swings back again. They found two scenarios: one requires further refinement at high energies, while the other works at all scales. Could quantum mechanics on its own prevent a singularity?
A spring compressed to the limit breaks. Likewise, classical gravity theory leads to a singularity—a point where all laws break down. Quantum mechanics turns this end into an elastic bounce. Wheeler and DeWitt described the universe as a wave of probabilities. A new model applies this to space closed like a ball. Energy, like a built-in spring, makes it contract and expand.
Physicists discovered two scenarios. The first resembles the usual flow of time—expansion after contraction, as in some approaches. But at high energies, the spring 'jams': calculations require corrections.
The second scenario is elegant: the Big Bang becomes a Big Bounce, and time reverses. Past and future swap places. The bounce works on its own, without crutches.
The quantum world smooths out spacetime curvature in the infant universe. The idea can be tested via the cosmic microwave background—perhaps it hides ring-like patterns of gravitational waves.
🎯 According to one scenario, the universe arose from the collision of two three-dimensional membranes in a space with more dimensions.