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Quantum Bounce: A Black Hole Turns into a White One

Original: "Relational quantum dynamics of the black hole interior: singularity resolution and quantum bounce"
· Paolo Fragolino, Saeed Rastgoo
arXiv:2605.01576v1 · 2026-05-02 · CC BY · ⏱ 1 min · General Relativity
Inside a black hole, space doesn't collapse into a point; it compresses like a spring and bounces back, giving birth to a white hole.
Abstract

Inside a black hole, everything falls toward an infinite point. But quantum effects won't let that happen: the collapse gives way to expansion, and the black hole becomes a white hole. As if the universe takes a breath in and out?

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A black hole is a cosmic trap: its gravity won't let even light escape. Classical theorems by Penrose say that at the center a singularity forms — a point of infinite density where physics breaks down.

But quantum mechanics abhors infinities. Using the idea of relative time by Dirac and uncertainty by Heisenberg, physicists have shown: inside the hole, a spatial coordinate takes on the role of a clock. Under the influence of quantum entanglement, it cannot shrink to zero — space behaves like a compressed spring: it bounces and starts expanding.

Measurements confirm: the area inside drops to a minimum, then grows. Curvature doesn't shoot to infinity. Thus, a black hole turns into a white one — a region from which everything is ejected. Quantum information isn't destroyed; it resurfaces in another universe.

🎯 In the quantum model, one of the spatial axes inside the hole becomes a clock: it doesn't collapse to a point but springs back, like a released coil.

🎬 It’s reminiscent of 'Interstellar': a black hole as a portal, but without a wormhole — just a quantum bounce.

A_{\min} = 4\pi (\Delta a)^2
A min — minimum area, Δa — quantum uncertainty in size. The greater the fuzziness, the larger the minimum volume.
Scientists
Erwin SchrödingerHugh Everett IIINiels BohrPascual JordanWerner HeisenbergStephen Hawking
Tags
black hole gravity spacetime curvature quantum entanglement uncertainty principle quantum measurement Time dilation quantum information
Laws
Schrödinger equationHeisenberg uncertainty principleHawking radiationgravitational lensingBekenstein-Hawking entropyEinstein field equations
Original: arXiv:2605.01576v1 · CC BY · bridge42worlds