Density-Driven Spacetime Expansion

[SheatsToTheWind]

Collaborator Needed for Density-Driven Spacetime Expansion (DDSE) Model

 

Body:

Hello, fellow enthusiasts and professionals,

 

I’m currently developing a thesis on a novel concept I call the Density-Driven Spacetime Expansion (DDSE) Model. This model links density, time dilation, and localized expansion to explain phenomena such as dark energy and spacetime curvature. While I've made significant progress in areas like the mathematical framework, simulations, and conceptual diagrams, I’m looking for a collaborator to refine the model further.

 

Ideally, I’m seeking someone with expertise in:

 

Advanced mathematics (tensor calculus, differential equations)

 

Physics (cosmology, general relativity, or quantum mechanics)

 

Simulation and data validation tools

 

 

Your input could help expand the scope and accuracy of the model, bringing us closer to a clearer understanding of the universe. If this aligns with your interests, I’d love to discuss ideas and share insights.

 

Feel free to reach out here or via private message. Let’s push the boundaries of physics together!

 

Best regards,

Bradley Sheats

[Phi for All]

4 minutes ago, SheatsToTheWind said:

Feel free to reach out here or via private message.

!

Moderator Note

This is a science discussion forum. We can discuss your idea here if you like, in public.

If you prefer to keep your idea private, I can lock the thread. Please don't contact members via PM for this.

 

[SheatsToTheWind]

Oh ok sorry I'm new to using forums. I'm just looking for like minded people who enjoy science as much as me. Are you interested in this topic?

6 hours ago, Phi for All said:

!

Moderator Note

This is a science discussion forum. We can discuss your idea here if you like, in public.

If you prefer to keep your idea private, I can lock the thread. Please don't contact members via PM for this.

 

 

[Genady]

11 minutes ago, SheatsToTheWind said:

Are you interested in this topic?

Depends.

What is 'spacetime expansion'?

[SheatsToTheWind]

4 hours ago, Genady said:

Depends.

What is 'spacetime expansion'?

Spacetime expansion refers to the idea that the fabric of the universe itself is stretching, causing galaxies to move away from each other. It’s not that galaxies are traveling through space, but rather, the space between them is increasing over time. This phenomenon explains the observed redshift of light from distant galaxies and is a key aspect of cosmology. It’s driven by dark energy, which accelerates the rate of expansion

5 hours ago, SheatsToTheWind said:

Oh ok sorry I'm new to using forums. I'm just looking for like minded people who enjoy science as much as me. Are you interested in this topic?

 

 

4 hours ago, Genady said:

Depends.

What is 

 

11 hours ago, Phi for All said:

!

Moderator Note

This is a science discussion forum. We can discuss your idea here if you like, in public.

If you prefer to keep your idea private, I can lock the thread. Please don't contact members via PM for this.

 

 

[Genady]

19 minutes ago, SheatsToTheWind said:

Spacetime expansion refers to the idea that the fabric of the universe itself is stretching, causing galaxies to move away from each other. It’s not that galaxies are traveling through space, but rather, the space between them is increasing over time.

So, it is space expansion. Why do you call it spacetime expansion?

What is 'fabric of the universe'?

[SheatsToTheWind]

I use the term 'spacetime expansion' instead of just 'space expansion' because space and time are fundamentally interconnected in Einstein's theory of relativity. When space expands, it affects the passage of time as well. Time dilation—the slowing down or speeding up of time relative to observers—occurs due to the interplay of gravitational effects and expansion. My model, the Density-Driven Spacetime Expansion (DDSE), highlights how these two aspects are inseparable. By focusing on spacetime as a whole, I aim to provide a more comprehensive explanation of the universe's dynamics.

[zapatos]

Since expansion is not the movement through space, how is that connected to Relativity?

How is the passage of time modified by expansion? Are you saying time is modified both by expansion and relative velocity through space?

[Genady]

Is metric you use different from FLRW?

[SheatsToTheWind]

The FLRW metric describes a homogeneous, isotropic universe, which assumes uniform expansion. My model, however, introduces localized variations in expansion rates driven by density differences. This means my approach modifies the standard FLRW metric by incorporating density gradients and time dilation into the equations for expansion.

 

In regions of higher density, the effects of gravity and time dilation slow the local expansion, creating deviations from a purely isotropic metric. This refinement offers a way to account for observed anomalies, such as those related to galaxy cluster behavior and discrepancies in Hubble constant measurements."

The expansion of spacetime is a geometric phenomenon, not a motion of objects through a fixed space. This concept is directly connected to General Relativity, which describes gravity and the universe's structure in terms of spacetime curvature. The key is that spacetime itself stretches, increasing the distance between stationary objects without them 'traveling' through space.

 

Relativity comes into play because the stretching of spacetime affects the passage of time and the energy of photons (redshift). In my model, the density of matter and energy modifies spacetime curvature, which in turn affects local and global expansion rates. This ties expansion and relativity into a dynamic relationship, emphasizing how spacetime is shaped by density variations

Yes, the passage of time is influenced by both spacetime expansion and relative velocity, but in distinct ways:

 

1. Expansion's Effect on Time:

In regions of expanding spacetime, time dilation occurs due to the stretching of spacetime itself. Observers in different parts of the universe experience time differently depending on their local expansion rate, which is influenced by density.

 

 

2. Relative Velocity's Effect on Time:

According to Special Relativity, time slows for objects moving at high velocities relative to an observer. This effect is independent of spacetime expansion but can combine with it in complex ways.

 

 

 

In my model, these two effects are intertwined. Density-driven expansion modifies the local passage of time, while relative velocity through curved spacetime introduces additional relativistic time dilation. By considering both, we can account for observed variations in redshift and galaxy motion

 

[Genady]

In your model, is the universe homogeneous and isotropic on a scale 100+ Mpc?

[SheatsToTheWind]

In my model, the universe is not strictly homogeneous and isotropic, even on scales greater than 100 Mpc. While the standard cosmological principle assumes homogeneity and isotropy on large scales, the DDSE model introduces the idea that density variations—though smaller in magnitude at these scales—can still influence localized spacetime expansion rates and time dilation effects.

 

Specifically:

 

1. Localized Effects Persist:

The model posits that density-driven variations, though diminished, still affect spacetime expansion. These variations could manifest as subtle deviations from perfect isotropy, potentially explaining observed anomalies in the cosmic microwave background (CMB) and Hubble tension.

 

 

2. Statistical Homogeneity:

On scales greater than 100 Mpc, the universe may still appear statistically homogeneous and isotropic when averaged over large volumes. However, these averages could mask localized density effects, which influence time dilation and expansion rates at finer resolutions.

 

 

3. Observable Consequences:

By incorporating density-driven variations, the DDSE model predicts slight deviations from perfect isotropy, which could be tested with high-resolution surveys (e.g., JWST, Euclid, LSST). These deviations may align with observed large-scale structures like filaments, voids, and superclusters.

 

 

 

In summary: The DDSE model does not reject large-scale homogeneity and isotropy but refines it by accounting for the lingering influence of density variations, offering an explanation for localized anomalies within an otherwise statistically homogeneous framework.

[Genady]

Isn't your model similar to one discussed here: 

 

[SheatsToTheWind]

While my Density-Driven Spacetime Expansion (DDSE) model shares some similarities with the study you referenced, they are fundamentally different in their mechanisms and focus.

 

Similarities:

 

Both models explore the universe’s inhomogeneities (its 'lumpiness') and propose alternatives to the standard dark energy explanation for the observed acceleration of expansion.

 

Both recognize the importance of time dilation effects influenced by local densities.

 

 

Differences:

 

The study by Professor David Wiltshire attributes the apparent acceleration to variations in kinetic energy due to gravitational time dilation in a lumpy universe. In contrast, my DDSE model proposes that localized density variations directly influence the rate of spacetime expansion and time dilation.

 

My model suggests that spacetime expansion is density-driven, meaning regions with higher density expand more slowly, while less dense regions expand more rapidly. This creates localized deviations from uniform expansion, which my model incorporates into its predictions.

 

 

In summary, while both approaches challenge the standard dark energy paradigm and focus on inhomogeneities, the DDSE model provides a unique perspective by emphasizing density-driven dynamics as the primary driver of spacetime expansion

[Markus Hanke]

15 hours ago, SheatsToTheWind said:

The FLRW metric describes a homogeneous, isotropic universe, which assumes uniform expansion.

It’s the other way around - the fundamental assumption in standard cosmology is the cosmological principle, and homogenous expansion follows from this.

15 hours ago, SheatsToTheWind said:

This means my approach modifies the standard FLRW metric by incorporating density gradients and time dilation into the equations for expansion.

What do you mean “modifies the FLRW metric”? Do you mean you have worked out a different solution to the Einstein equations?

Perhaps you could just post here your new metric in mathematical form (the forum supports LaTeX), which would make it easier to discuss things.

Note also that none of this is exactly new - inhomogenous cosmologies in various forms have been studied for a long time, see here for an overview of the most important models.