Related Experiment Video
Updated: Sep 19, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Quantum entanglement dynamics of spacetime and matter
1National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China.
A new information-complete quantum field theory (ICQFT) unifies gravity and matter as spacetime-matter entanglement. This resolves fundamental inconsistencies, offering a quantum gravity solution and explaining dark energy.
Area of Science:
- Theoretical Physics
- Quantum Gravity
- Quantum Field Theory
Background:
- Quantum theory and general relativity have foundational conflicts, posing a significant challenge for quantum gravity.
- Existing theories struggle with conceptual inconsistencies between quantum mechanics and gravity.
Purpose of the Study:
- To propose an information-complete quantum field theory (ICQFT) that unifies fermions, gauge fields, and gravity.
- To resolve conceptual inconsistencies in existing theories of quantum gravity.
- To provide a framework for understanding spacetime-matter entanglement and its implications.
Main Methods:
- Development of an information-complete quantum field theory (ICQFT) describing elementary fermions, gauge fields, and gravity as a unified trinity.
- Unification of matter and spacetime (gravity) through spacetime-matter entanglement.
- Analysis of specific spacetime-matter entangled states and their physical consequences.
Main Results:
- The proposed ICQFT eliminates conceptual inconsistencies between quantum theory and general relativity.
- Spacetime-matter entanglement provides a solution to the problem of time and encodes complete physical predictions.
- A universal relation between entanglement entropy and geometry was derived, determining the cosmological constant.
- A quantum-information definition of dark energy suggests the universe is not strictly holographic.
- The interior quantum state of a Schwarzschild black hole is predicted to be maximally information-complete.
Conclusions:
- The ICQFT offers a concrete quantum formulation of gravity coupled with matter.
- It redefines quantum gravity as quantum entanglement dynamics for spacetime and matter.
- The theory eliminates conceptual obstacles in existing quantum gravity research.
Related Concept Videos
Space-Time Curvature and the General Theory of Relativity
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
The de Broglie Wavelength
The Quantum-Mechanical Model of an Atom
Electromagnetic Waves in Matter
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
Entropy
The Uncertainty Principle

