Reinventing Gravity
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Reinventing Gravity: A Theory of Everything Based on Effective Gravitational Velocity
The book "Reinventing Gravity: A Theory of Everything Based on Effective Gravitational Velocity," written by Rogelio Perez Casadiego, presents an innovative and ambitious proposal for a Theory of Everything (ToE). Main Objective: The central objective of the book is to present a radical alternative to current theories, such as General Relativity and the ΛCDM model, proposing that gravity is neither a fundamental force nor a curvature of space-time, but an emergent phenomenon. This emergence is based on a central concept introduced by the author: the effective gravitational velocity (eGV). Approach and Content: 1. Reinterpretation of Gravity: Gravity is conceived as a collective manifestation of the fundamental interactions of the universe, similar to how thermodynamics emerges from statistical mechanics. It is described more as an optical phenomenon or a modification of the properties of the quantum vacuum influenced by matter and energy, rather than a geometric curvature. 2. Unification of Forces: The book develops a unified Lagrangian (LToE = LQCD + LQED + Lweak- 1/2 m vg² ψ̄ ψ) that integrates the Standard Model descriptions for the strong, electromagnetic, and weak interactions, incorporating gravity as a local coupling term that modifies the effective mass of fermions. This connects gravity with quantum mechanics, thermodynamics, and quantum field theory. 3. Dark Matter Alternative: The proposed theory, called Effective Quantum Gravity (NETQG), offers an alternative explanation for the gravitational effects attributed to dark matter. It suggests that these effects may be due to the distribution of baryonic matter into exotic, ultra-cold states (such as ionic crystals or Bose-Einstein condensates) influenced by vg gradients, eliminating the need to postulate undetected exotic particles. 4. Theoretical and Observational Validation: The book explores how this theory reproduces well-known phenomena such as Mercury's perihelion precession, Earth's gravitational acceleration, solar gravitational redshift, and time shifts in GPS clocks. It also addresses cosmological observations such as galactic rotation curves and the Bullet Cluster effect. 5. Implications and Verification: The profound philosophical and scientific implications of this approach are discussed, including a monistic and emergentist view of reality. The book proposes specific experiments, such as networks of entangled quantum clocks, to measure gravity-induced quantum phase shifts and verify the theory. Potential technological applications in quantum sensors, metrology, and space exploration are also explored. 6. Challenges and Future: The author acknowledges the significant challenges facing the theory, such as the lack of scientific consensus, the need for advanced cosmological simulations, and the need to obtain direct evidence of ultracold matter. Future lines of research are presented to consolidate or refute the proposal. In summary, the book offers a novel and unified view of the universe, reinterpreting gravity and dark matter within a coherent theoretical framework based on emerging quantum and thermodynamic principles, with the potential to impact both fundamental physics and future technology.
Reinventing Gravity
Einstein's gravity theory—his general theory of relativity—has served as the basis for a series of astonishing cosmological discoveries. But what if, nonetheless, Einstein got it wrong? Since the 1930s, physicists have noticed an alarming discrepancy between the universe as we see it and the universe that Einstein's theory of relativity predicts. There just doesn't seem to be enough stuff out there for everything to hang together. Galaxies spin so fast that, based on the amount of visible matter in them, they ought to be flung to pieces, the same way a spinning yo-yo can break its string. Cosmologists tried to solve the problem by positing dark matter—a mysterious, invisible substance that surrounds galaxies, holding the visible matter in place—and particle physicists, attempting to identify the nature of the stuff, have undertaken a slew of experiments to detect it. So far, none have. Now, John W. Moffat, a physicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada, offers a different solution to the problem. The capstone to a storybook career—one that began with a correspondence with Einstein and a conversation with Niels Bohr—Moffat's modified gravity theory, or MOG, can model the movements of the universe without recourse to dark matter, and his work challenging the constancy of the speed of light raises a stark challenge to the usual models of the first half-million years of the universe's existence. This bold new work, presenting the entirety of Moffat's hypothesis to a general readership for the first time, promises to overturn everything we thought we knew about the origins and evolution of the universe.
Gravity's Mysteries
Gravity is the most detectable physical phenomenon of the universe. Nothing or nobody can escape its grasp, even in very large, astronomical distances. It is manifested in many aspects of our lives. Yet we are still not really sure what carries it. The gradually increasing understanding of gravity throughout history and its observed effects in various physical fields are the subjects of this book. This is an enlightening read about one of the most misterious phenomena of our lives that is still far from being fully understood, presenting a historical journey through several millennia of encountering and understanding gravity's mysteries.