with Ada.Text_IO; use Ada.Text_IO;
with Ada.Float_Text_IO; use Ada.Float_Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
with Ada.Numerics.Elementary_Functions;
use Ada.Numerics.Elementary_Functions;
procedure Emergent_Spacetime is
N : constant Positive := 21;
subtype Grid_Range is Integer range 1 .. N;
type Scalar_Field is array (Grid_Range, Grid_Range) of Float;
E0 : constant Float := 1.0;
Alpha : constant Float := 1.0;
Sigma : constant Float := 3.0;
E_Min : constant Float := 0.01;
Cx : constant Integer := (N + 1) / 2;
Cy : constant Integer := (N + 1) / 2;
Entanglement : Scalar_Field := (others => (others => E0));
Distance : Scalar_Field := (others => (others => 0.0));
Phi : Scalar_Field := (others => (others => 0.0));
Curvature : Scalar_Field := (others => (others => 0.0));
function Lattice_Radius (I, J : Integer) return Float is
begin
return Sqrt (Float ((I - Cx) ** 2 + (J - Cy) ** 2));
end Lattice_Radius;
function Max_F (A, B : Float) return Float is
begin
if A > B then return A; else return B; end if;
end Max_F;
function Abs_F (A : Float) return Float is
begin
if A < 0.0 then return -A; else return A; end if;
end Abs_F;
procedure Compute_Fields (M : Float) is
R : Float;
Perturbation : Float;
Laplacian : Float;
Scale_Factor : Float;
begin
for I in Grid_Range loop
for J in Grid_Range loop
R := Lattice_Radius (I, J);
Perturbation := M * Exp (-(R ** 2) / (2.0 * Sigma ** 2));
Entanglement (I, J) := Max_F (E0 - Perturbation, E_Min);
end loop;
end loop;
for I in Grid_Range loop
for J in Grid_Range loop
Distance (I, J) := Alpha / Entanglement (I, J);
end loop;
end loop;
for I in Grid_Range loop
for J in Grid_Range loop
Phi (I, J) := Log (Distance (I, J));
end loop;
end loop;
Curvature := (others => (others => 0.0));
for I in 2 .. N - 1 loop
for J in 2 .. N - 1 loop
Laplacian := Phi (I + 1, J) + Phi (I - 1, J)
+ Phi (I, J + 1) + Phi (I, J - 1)
- 4.0 * Phi (I, J);
Scale_Factor := Exp (-2.0 * Phi (I, J));
Curvature (I, J) := -Scale_Factor * Laplacian;
end loop;
end loop;
end Compute_Fields;
Algorithm Walkthrough
Step 1: Build Entanglement Field
E(i,j) = E₀ - M · exp(-r² / 2σ²)
Mass disrupts local entanglement proportional to its strength M. The Gaussian falloff ensures the disruption is localized.
Step 2: Compute Emergent Distances
ds = α / E
Higher entanglement means shorter emergent distance — the Ryu-Takayanagi intuition inverted. This is the bridge from quantum information to geometry.
Step 3: Calculate Conformal Factor
φ = ln(ds)
For a conformally flat metric g = e^(2φ) · δ, the conformal factor captures how the metric deviates from flat space.
Step 4: Compute Gaussian Curvature
K = -e^(-2φ) · ∇²φ
Using the discrete Laplacian on the lattice, we calculate how curved the emergent space is at each point.
Four Experiments
01
Single Mass Analysis
Full field computation showing entanglement cross-section and radial curvature profile compared to analytical predictions.
02
Linearity Test
Verifies K ∝ M — the equivalence principle. Peak curvature should scale linearly with mass in the weak field limit.
03
2D Curvature Map
ASCII visualization showing the gravitational well pattern: positive curvature at center, negative stretching ring, asymptotically flat edges.
04
Flat Space Verification
With M = 0, curvature should be exactly zero everywhere. A sanity check that the math works.