Thursday, March 13, 2025

black holes white holes time dark energy study

Black Holes: Not Endings, but Beginnings? New Study Explores the Role of White Holes

Revolutionary Findings Reshapes Our Understanding of Black Holes and Time

white hole digital impression. Credit: Philip Drury, University of Sheffield

Revolutionary findings from the University of Sheffield may unravel key cosmic mysteries, reshaping how we perceive black holes, time, and the elusive dark energy governing the universe.

Understanding Black Holes and Their Enigmatic Nature

The Fascination with Black Holes

Black holesphenomena where gravitational forces are so immense that light itself cannot break freehave long been a subject of intrigue, drawing the attention of astrophysicists and physicists eager to decode their complexities. Their enigmatic nature has also sparked the imagination of writers and filmmakers, with iconic films like "Interstellar" depicting their captivating pull on human curiosity.

Einstein's Theory of Relativity and the Singularity

Einstein's general theory of relativity suggests that any object or person trapped inside a black hole would be drawn toward its core, where they would be torn apart by extreme gravitational forces. This core, referred to as the singularity, represents the point where the remnants of a massive star, collapsed to form the black hole, are compressed into an infinitesimally small space. At this singularity, the laws of physics and our perception of time cease to function as we understand them.

New Study Challenges Conventional Black Hole Theories

Quantum Mechanics and Black Hole Singularities

By applying the principles of quantum mechanicsa foundational theory governing the behavior of atoms and subatomic particlesthis new study challenges conventional thought, proposing that the singularity within a black hole may not mark an end but instead herald a new beginning.

Key Findings from the Research

A newly published paper in Physical Review Letters, "Black Hole Singularity Resolution in Unimodular Gravity from Unitarity", sheds light on the theoretical limits of physics, where time itself begins to unravel.

The Role of White Holes in Cosmic Evolution

How White Holes Differ from Black Holes

While black holes are known for their gravitational pull, drawing in everything—including time—into a singularity, this research suggests that white holes operate inversely, expelling matter, energy and time outward.

Planar Black Holes: A New Model for Study

The research employs a simplified theoretical model of a black hole, termed a planar black hole, Unlike conventional black holes, which exhibit a spherical geometry, a planar black hole features a flat, two-dimensional boundary. Ongoing investigations indicate that this mechanism may extend to standard black holes as well.

Quantum Mechanics and the Persistence of Time

Dr. Steffen Gielen on the Study's Significance

"The extent to which quantum mechanics can redefine our understanding of black holes and unveil their fundamental nature has been an enduring question," stated Dr. Steffen Gielen from the University of Sheffield's School of Mathematical and Physical Sciences, who co-authored the study with Lucia Menéndez-Pidal of Complutense University of Madrid.

Quantum Fluctuations at the Singularity

In quantum mechanics, time does not simply cease; instead, all systems continue to evolve and transform indefinitely.

The researchers' findings reveal that, according to quantum mechanics, the black hole singularity is substituted by a domain of significant quantum fluctuations—minute, transient shifts in spatial energy—where space and time persist beyond conventional limits. This transition leads to the emergence of a white hole, a theoretical construct that operates inversely to a black hole, potentially marking the inception of time.

The Influence of Dark Energy on Time and Black Holes

Dark Energy as the Driving Force of Time

"Although time is conventionally regarded as relative to the observer, our research suggests that it emerges from the enigmatic dark energy that pervades the cosmos," Dr. Gielen explained.

"Our research suggests that time is fundamentally governed by the dark energy that permeates the cosmos and drives its drives its expansionan insight that is key to understanding black hole dynamics."

Interplay Between Dark Energy and Cosmic Expansion

Dark energy, an enigmatic theoretical force believed to drive the universe's accelerating expansion, serves as a fundamental reference in this study, where energy and time are treated as interdependent concepts.

Implications for the Future of Cosmology

Beyond the Singularity: A Mysterious Reality

Intriguingly, the notion that a singularity represents not an endpoint but a beginning raises the possibility of an even more mysterious reality beyond a white hole.

"Theoretically, an observer —albeit a hypothetical construct—could traverse a black hole, pass through what we perceive as a singularity, and emerge on the opposite side as a white hole," Dr. Gielen explained.

Future Research Directions

Beyond these theoretical speculations, the intricate relationship between time's fundamental nature and the enigmatic dark energy shaping the cosmos will continue to be investigated in the coming months and years.

This research introduces innovative pathways for bridging gravity and quantum mechanics, potentially leading to groundbreaking fundamental theories that reshape our understanding of the universe.

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Thursday, November 21, 2024

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DESI Data Unveils New Insights into Gravity's Cosmic Influence

DESI instrument capturing data from galaxies and quasars at the Nicholas U. Mayall Telescope, Kitt Peak National Observatory.

Overview of Gravity's Role in the Universe

The force of gravity, pivotal in shaping our universe, magnified minor early matter fluctuations into the expansive galaxy networks visible today. Recent research employing DESI data has charted 11 billion years of cosmic development, delivering the most precise large-scale test of gravity.

What is DESI?

The Dark Energy Spectroscopic Instrument (DESI) is a global collaboration involving over 900 scientists from more than 70 institutions worldwide, overseen by the U.S. Department of Energy's Lawrence Berkeley National Laboratory.

Key Findings from DESI Research

In their recent study, DESI researchers confirmed that gravity operates in line with Einstein's general relativity, supporting the prevailing cosmological model and constraining alternative theories of modified gravity, often invoked to explain phenomena like the universe's accelerating expansion typically linked to dark energy.

Gravity and Einstein's General Relativity

Testing Gravity on Cosmic Scales

"General relativity has been extensively validated on solar system scales, but testing its applicability on much larger cosmic scales is crucial," said Pauline Zarrouk, a cosmologist at CNRS and co-leader of the analysis at the Laboratory of Nuclear and High-Energy Physics (LPNHE).

Importance of Galaxy Formation Rates

"Analyzing galaxy formation rates provides a direct means to test our theories, which, thus far, remain consistent with general relativity at cosmological scales," Zorrouk added.

Neutrino Mass and Its Implications

The research additionally set new upper boundaries on neutrino mass, the only fundamental particles whose exact masses remain undetermined.

Findings on Neutrino Mass

Earlier neutrino experiments determined that the combined mass of the three neutrino types must be at least 0.059 eV/c², compared to the electron's mass of approximately 511,000 eV/c². DESI's findings suggest the sum is less than 0.071 eV/c², narrowing the range for neutrino masses.

DESI's Groundbreaking Data on the Universe's Evolution

The DESI collaboration has published their findings in multiple papers on the FSNews365 preprint server. Leveraging data from nearly 6 million galaxies and quasars, the analysis offers a glimpse into the universe's past stretching back 11 billion years.

Advancements in Structure Growth Measurement

Remarkably, DESI achieved the most precise measurement of structure growth within a single year, exceeding results that took decades to accomplish.

Exploring DESI's Inaugural Year and Major Discoveries

This study offers a deeper exploration of DESI's inaugural year of data, which, in April, unveiled the largest-ever 3D cosmic map and suggested that dark energy may evolve with time.

Insights from April's Findings

April's findings focused on baryon acoustic oscillations (BAO), a key aspect of galaxy clustering. The new "full-shape analysis" extends this work, examining the distribution of galaxies and matter across various spatial scales.

Ensuring Accuracy: The Blinding Technique

The research involved months of meticulous work and verification. Similar to the prior study, a blinding technique was employed to conceal results until completion, reducing potential unconscious bias.

Key Insights from Dragan Huterer

"Our BAO findings and the full-shape analysis are remarkable achievements," states Dragan Huterer, a University of Michigan professor and co-leader of DESI's cosmological data interpretation team.

Looking Ahead: The Future of DESI and Cosmological Research

For the first time, DESI has examined the growth of cosmic structures, demonstrating remarkable potential to investigate modified gravity and refine dark energy models. And this is just the beginning.

Dark Energy Spectroscopic Instrument imaging the night sky

DESI's Cutting-Edge Instrumentation

DESI, a cutting-edge instrument, simultaneously captures light from 5,000 galaxies. Mounted on the Nicholas U. Mayall 4-meter Telescope at NSF's Kitt Peak National Observatory, this experiment is in its fourth year of a five-year survey and aims to collect data from 40 million galaxies and quasars by its conclusion.

Anticipated Results by Spring 2025

Researchers are now analyzing data from DESI's first three years and anticipate releasing updated insights on dark energy and the universe's expansion history by spring 2025. Early findings, indicating a possible evolution of dark energy, heighten excitement for these forthcoming results.

Uncovering the Mysteries of Dark Matter and Dark Energy

Dark matter constitutes roughly 25% of the universe, while dark energy accounts for 70%. Yet, their true nature remains elusive.

Insights from Mark Maus

"It's astonishing to think that capturing images of the universe allows us to address these profound questions," noted Mark Maus, a Ph.D. candidate at Berkeley Lab and UC Berkeley, involved in theoretical and validation modeling for the analysis.

Cultural Significance of DESI's Research Location

The DESI collaboration is privileged to undertake scientific research on I'oligam Du'ag (Kitt Peak), a mountain of profound cultural importance to the Tohono O'odham Nation.

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Friday, November 8, 2024

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Fluids at Light Speed: How New Research Extends Einstein's Theory to Real Liquids

Introduction: Special Relativity and Its Surprising Concepts

The theory of special relativity presents numerous surprising concepts, with length contraction and time dilation being among the most well-known. When an object moves at a substantial fraction of the speed of light relative to an observer, its length as perceived in the travel direction will appear compressed compared to its stationary frame.

The Lorentz Factor: Understanding Length Contraction

What is the Lorentz Factor?

  • Specifically, the object's observed length will be reduced by a factor equivalent to the reciprocal of the Lorentz Factor.
  • This factor depends solely on the relative velocity between the object and the observer as well as the speed of light.
  • As the Lorentz factor is always one or greater it results in the "length contraction" effect.

Exploring Relativistic Effects Beyond Time and Length

Could Other Properties Experience Relativistic Effects?

  • While time dilation and length contraction are well-known relativistic effects recognized even before Einstein's groundbreaking 1905 publication on special relativity they prompt curiosity as to whether other fundamental physical properties might exhibit additional relativistic effects.

The Challenge of Relativistic Fluid Viscosity

The Missing Link in Relativistic Hydrodynamics

  • For example, although there has been significant progress in relativistic hydrodynamics, a theory of fluid viscosity that seamlessly aligns with classical gas limits has yet to be achieved.
  • This shortfall indicates that current relativistic viscosity models still lack completeness.

A New Theory for Fluid Viscosity at Light Speed

Introducing the Microscopic Relativistic Theory

A Breakthrough in Fluid Viscosity

  • In a recent article published in Physical Review E, I developed a comprehensive microscopic theory for fluid viscosity.
  • This theory is rooted in the newly proposed relativistic Langevin equation, derived from a relativistic particle-bath Lagrangian.

The Role of Nonaffine Particle Displacement

  • Incorporates a microscopic nonaffine approach to particle displacement under flow.
  • This framework captures the microscopic dynamics of particles (atoms or ions) as they interact and collide within an applied flow field.

While particles tend to follow the flow field, their interactions with other particles cause deviations from this path. These "nonaffine" motions play a significant role in dissipating momentum within the moving fluid.

Viscosity and the Lorentz Factor: A New Understanding

The Relationship Between Viscosity and Proper Momentum

How Does Relativity Affect Fluid Viscosity?

  • According to special relativity, the "proper momentum"the momentum relevant for an object's motion relative to an observer—is the particle's ordinary momentum multiplied by the Lorentz factor.
  • This factor is always greater than 1 and becomes exceptionally large as the object nears the speed of light.

Proportionality of Viscosity and Lorentz Factor

  • The new theory I've derived reveals that the viscosity of a fluid, which correlates to the loss of proper momentum in a fluid moving near light speed is proportional to the fluid's ordinary viscosity at lower speeds, scaled by the Lorentz factor.

Testing the New Theory in Low-Speed Regimes

Validating the Theory with Classical Gas Viscosity

Testing the Non-Relativistic Limit

  • I was pleasantly surprised to find that when testing my microscopic relativistic theory in the non-relativistic regime of low speed, it could accurately reproduce the viscosity of classical gases as predicted by kinetic theory and validated by numerous aerodynamic experiments.
  • Specifically, the new formula successfully mirrored the known dependencies of viscosity on temperature, particle mass, size, and Boltzmann's constant, as observed in classical gases like air flowing around an aircraft wing.

Implications for High-Energy Fluids

Viscosity at Extreme Speeds: High-Energy Fluids and Relativistic Plasmas

Predictions for High-Energy Fluids

  • The theory predicts that high-energy fluids, such as quark-gluon plasma and relativistic plasmas, moving at extreme speeds exhibit a cubic dependence on temperature, consistent with experimental data.
  • This result gives rise to a new fundamental law of physics that integrates the fundamental constants of nature.

Fluid Thickening: A Novel Relativistic Effect

Unveiling a Previously Overlooked Effect

Introducing Fluid Thickening

  • In an intriguing realization, I found that the new theory could potentially expose a previously ignored effect within Einstein's relativity.
  • Similar to length contraction and time dilation, we could conceptualize 'fluid thickening' as a novel relativistic effect.

Potential Impact on Astrophysics and High-Energy Physics

Significance for Understanding Relativistic Plasmas

  • This effect has been largely overlooked yet it could play a crucial role in our understanding of relativistic plasmas in fields like astrophysics and high-energy physics.
  • Especially in relation to quark-gluon plasma created in high-energy nuclear collisions.

Conclusion: A New Chapter in Relativistic Fluid Dynamics

This new theory not only extends Einstein's theory of relativity to real fluids but also uncovers new relativistic effects that may reshape our understanding of high-energy physics and fluid dynamics in extreme environments. The discovery of 'fluid thickening' opens doors to further exploration in fields such as astrophysics and quark-gluon plasma research.

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Discover More About Relativistic Fluids and Their Implications!

Dive deeper into the fascinating world of relativistic fluid dynamics. Stay updated with the latest research and developments that are redefining our understanding of high-energy physics. Read more on how this new theory could revolutionize astrophysics, quark-gluon plasma research, and much more.

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