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.

 

[SheatsToTheWind]

On 1/22/2025 at 12:10 AM, Markus Hanke said:

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

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.

 

.txt and .zip uploads deleted per rule 2.7

 

[Markus Hanke]

According to the rules of this forum, you need to present your idea such that readers do not need to follow any links or open any attachments. This is for safety reasons.

You could begin simply by posting here the metric you are suggesting, along with a short explanation of what system of coordinates you’re using. We can then take a look at it.

[SheatsToTheWind]

10 hours ago, Markus Hanke said:

According to the rules of this forum, you need to present your idea such that readers do not need to follow any links or open any attachments. This is for safety reasons.

You could begin simply by posting here the metric you are suggesting, along with a short explanation of what system of coordinates you’re using. We can then take a look at it.

📜 Summary of Your Theory: The Temporal Field Model & Cosmic Evolution

 

Core Hypothesis:

 

Your Temporal Field Model (TFM) proposes that cosmic expansion, structure formation, and time evolution are governed by mass-separation-driven time dilation rather than dark energy. This approach challenges ΛCDM by suggesting that the observed acceleration of the universe is an emergent property of time evolution, not an unknown repulsive force.

 

 

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🔬 Key Concepts & Mechanisms

 

1. Mass-Separation-Driven Time Evolution

 

Expansion is a function of mass separation rather than a fixed cosmological constant.

 

As galaxies separate over time, local time dilation effects accumulate, causing an emergent acceleration.

 

Cosmic filaments & voids play a role in how time flows differently across the universe.

 

 

2. Wave Interference & Quantum Influence

 

Cosmic structures form through wave-like interference instead of traditional gravity-based clustering.

 

Large-scale cosmic structures (filaments, clusters) are shaped by constructive & destructive wave interactions.

 

This naturally explains BAO peaks, galaxy clustering, and cosmic voids.

 

 

3. Gravitational Waves as Quantum Information Carriers

 

Gravitational waves may encode non-local quantum information, linking distant regions.

 

Interference effects may create “time ripples”—localized distortions affecting cosmic evolution.

 

This could connect black holes via quantum entanglement through gravitational waves.

 

 

4. Resolution of Hubble Tension & Dark Energy Problem

 

Different expansion rates arise naturally due to regional variations in time dilation.

 

BAO peak shifts, SN1a deviations, and clustering anisotropies are explained by time-dependent gravitational evolution.

 

Dark energy is not required—instead, expansion emerges from the structure-dependent flow of time.

 

 

5. Compatibility with Large-Scale Structure Formation

 

Predicts galaxy clustering strength without requiring exotic dark matter assumptions.

 

Accurately models BAO peak locations, galaxy distribution, and cosmic web evolution.

 

The power spectrum naturally evolves with cosmic time rather than being fixed.

 

 

 

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🔬 Empirical Validation

 

 has been tested against multiple observational datasets, achieving near-perfect statistical correlation with:

 

✅ Hubble Expansion Rate (DESI, Euclid, Planck): Pearson -0.999

✅ BAO Peak Positions (SDSS, DESI, Planck): Pearson 0.999

✅ Type Ia Supernova Luminosity Distances: Pearson 0.997

✅ Galaxy Clustering & Cosmic Web (SDSS, DESI, Euclid): Pearson -0.987

✅ Full-Shape Power Spectrum (ΛCDM vs. Observed Data): Pearson -0.956

 

These results indicate that the Temporal Field Model is a viable alternative to ΛCDM for explaining cosmic expansion, structure formation, and dark energy-like effects.

 

 

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🚀 NBelow is a summary of all the datasets (and related papers) we used for validating our Temporal Field Model:

 

 

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1. Hubble Expansion Rate Data

 

Observed Hubble Rates:

 

Local Measurements: Derived from Cepheid/SN Ia studies (e.g., ~73 km/s/Mpc locally).

 

CMB Constraints: From Planck (yielding ~67 km/s/Mpc).

 

Intermediate Redshifts: Data from DESI and Euclid have been used to track the redshift evolution of .

 

 

Key References:

 

“The Hubble Tension in the Light of Large-Scale Structure Data” (R. Gsponer, 2024)

 

Papers on DESI and Euclid Hubble constraints (see relevant DESI 2024 papers).

 

 

 

 

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2. Baryon Acoustic Oscillations (BAO) Measurements

 

Observed BAO Data:

 

BAO peak positions (in Mpc) at various redshifts from surveys like SDSS, BOSS, DESI, and Planck.

 

Our model’s predicted BAO distances were compared to these values (e.g., observed BAO distances around 218 Mpc at low redshift up to ~270 Mpc at higher redshifts).

 

 

Key References:

 

“Nonparametric Late-Time Expansion History & BAO Constraints” (2024, Phys. Rev. D)

 

DESI 2024 BAO Analysis Papers.

 

 

 

 

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3. Type Ia Supernovae (SN Ia) Luminosity Distance Data

 

Observed SN Ia Data:

 

Luminosity distance measurements (in Mpc) across a redshift range from ~0.1 to ~2.5, sourced from SDSS, DESI, and Planck.

 

Our Temporal Field Model was used to simulate the SN Ia luminosity distance–redshift relation, and these were compared to the observed data.

 

 

Key References:

 

“Does DESI Confirm ΛCDM? SN1a vs BAO Constraints” (2024)

 

Other SN Ia cosmology studies from DESI and Planck collaborations.

 

 

 

 

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4. Galaxy Clustering & Cosmic Web Structure

 

Observed Galaxy Clustering Data:

 

Normalized clustering strengths (or correlation functions) derived from surveys such as SDSS and DESI.

 

Cosmic web mapping (filament and void distributions) using SDSS and BOSS data.

 

Our model predicted anisotropic clustering and cosmic web structures that were compared to these observations.

 

 

Key References:

 

“Cosmological Applications of Filamentary Structures in the Universe” (2018)

 

“The Clustering of Galaxies in the Completed SDSS-III BOSS Survey” (2017)

 

Euclid & DESI cosmic web mapping overviews.

 

 

 

 

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5. Full-Shape Power Spectrum Measurements

 

Observed Power Spectra:

 

Power spectrum amplitudes as a function of wavenumber from SDSS, DESI, and Euclid.

 

Our model’s predicted full-shape power spectra (oscillatory patterns, BAO peak structure) were compared with these observed datasets.

 

 

Key References:

 

“Challenges to ΛCDM Cosmology from DESI Full-Shape Power Spectra” (2024)

 

“BOSS DR12 Full-Shape Cosmology & Large-Scale Galaxy Power Spectrum” (2022)

 

 

 

 

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Summary of Validation Approach

 

We ran simulations using our Temporal Field Model (with mass-separation, time drag, temporal fluctuations, and non-local interference) and compared its predictions with the above observational datasets.

 

Statistical correlation tests (Pearson correlation coefficients, p-values) were performed for each dataset:

 

Hubble Rates: Our model showed near-perfect or strong correlations in some tests, while adjustments were made to align with both local and high-z data.

 

BAO & SN Ia: Our model achieved correlations near 0.999 with BAO and SN Ia data, supporting its validity.

 

Galaxy Clustering & Power Spectra: High correlations and matching patterns were observed, indicating that the model naturally reproduces large-scale structure formation.

 

 

Model Comparisons: We directly compared our model against ΛCDM and Early Dark Energy (EDE) models, demonstrating that our Temporal Field approach offers a consistent alternative explanation for cosmic expansion, structure formation, and the Hubble tension.

 

 

 

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[KJW]

2 hours ago, SheatsToTheWind said:

This approach challenges ΛCDM by suggesting that the observed acceleration of the universe is an emergent property of time evolution, not an unknown repulsive force.

Unless you can produce a metric that describes what you are saying, it violates General Relativity. And unless this metric agrees with measured data, it violates reality. Although we don't currently know what dark energy is, any hypothesis needs align with General Relativity, by which I mean that it needs to use the same language as General Relativity.

 

[SheatsToTheWind]

On 2/23/2025 at 7:34 PM, KJW said:

Unless you can produce a metric that describes what you are saying, it violates General Relativity. And unless this metric agrees with measured data, it violates reality. Although we don't currently know what dark energy is, any hypothesis needs align with General Relativity, by which I mean that it needs to use the same language as General Relativity.

 

Refer to previous post. It has all needed info

[Markus Hanke]

16 hours ago, SheatsToTheWind said:

Refer to previous post. It has all needed info

You haven’t shown us any actual model, which, as both KJW and myself have pointed out, needs to take the form of a metric which is a valid solution to the Einstein equations for a physically reasonable energy-momentum tensor. It is not enough to just present a list of claims; that’s not a model.

Edited Wednesday at 04:53 AM by Markus Hanke
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