Time Inside and Outside an Informational Markov Blanket/ Boundary
It from Bit
Spacetime Emerges from Changing Relationships (Entanglement) within and across the boundary
In modern theoretical physics, the idea that gravity is an emergent phenomenon arising directly from quantum entanglement is one of the most prominent frameworks for understanding the universe. [1, 2]While it remains an unproven mathematical theory, it has completely shifted how physicists approach the unification of quantum mechanics and general relativity. Instead of viewing gravity as a fundamental "force" that needs to be chopped up into particles (gravitons), this school of thought treats gravity as a secondary macroscopic byproduct—much like how inflation or temperature isn't a property of a single atom, but rather emerges from the collective behavior of countless atoms. [1, 2, 3, 4]1. The Holographic Principle and "Spacetime from Bits"The foundation for this idea lies in the Holographic Principle and the AdS/CFT correspondence discovered by Juan Maldacena. [1, 2]
- Mathematically, physicists can model a universe where a 3D bulk space containing gravity is entirely projected by a 2D boundary of quantum particles that do not experience gravity. [1]
- When the quantum particles on the 2D boundary become deeply entangled, they form intricate networks of quantum data. [1]
- The math shows that the geometric structure of the 3D space—and the way objects move through it—is just a visual translation of that entanglement. If you destroy the quantum entanglement on the boundary, the geometric fabric of space and gravity in the bulk completely collapses. [1]
2. ER = EPR (Wormholes equal Entanglement)Proposed by Leonard Susskind and Juan Maldacena, ER = EPR posits that the geometry of space and quantum connections are the exact same thing. [1, 2]
- ER (Einstein-Rosen Bridges): Wormholes or tunnels connecting distant points in space via gravity.
- EPR (Einstein-Podolsky-Rosen Paradox): Quantum entanglement, where two distant particles are instantly linked.
- The Conjecture: The framework suggests that if two particles are quantum entangled (EPR), they are actually connected by a microscopic, subatomic wormhole (ER). Gravity and physical distance are simply macroscopic manifestations of how these microscopic quantum links are woven together. [1, 2, 3, 4, 5]
3. Entropic and Coded GravityOther mainstream variations of emergent gravity approach the problem from different angles:
- Entropic Gravity: Proposed by Erik Verlinde, this theory treats gravity as an "entropic force" rather than a fundamental field. As quantum information changes and entropy shifts, it pushes matter around, creating the macroscopic illusion of gravitational pull. [1, 2]
- Quantum Error Correction: Recent breakthroughs view spacetime as a giant Quantum Error-Correcting Code (QECC). In this view, gravity is the physical manifestation of the system trying to protect and rearrange quantum information across its network. [1, 2, 3]
The Ultimate Catch: Is it true for our Universe?While the mathematics for these frameworks is highly precise and beautiful, it has a major limitation: it is currently calculated inside idealized, toy model universes (specifically, anti-de Sitter space, which has a negative cosmological constant and bends differently than ours). [1]Our real universe is expanding and flat/positively curved (de Sitter space). Physicists are actively working to translate these emergent-gravity mathematics into a model that matches our actual night sky, but for now, it remains a brilliant, mathematically robust hypothesis rather than an experimentally proven fact.

