Beyond the Dynamical Universe

2018 ◽  
Author(s):  
Michael Silberstein ◽  
W.M. Stuckey ◽  
Timothy McDevitt
Keyword(s):  
General Relativity ◽  
Initial Conditions ◽  
Big Bang ◽  
Theoretical Physics ◽  
Global Constraints ◽  
New Paradigm ◽  
Least Action Principle ◽  
Initial State ◽  
The Past ◽  
Foundations Of Physics

Theoretical physics and foundations of physics have not made much progress in the last few decades. There is no consensus among researchers on how to approach unifying general relativity and quantum field theory (quantum gravity), explaining so-called dark energy and dark matter (cosmology), or the interpretation and implications of quantum mechanics and relativity. In addition, both fields are deeply puzzled about various facets of time including, above all, time as experienced. This book argues that this impasse is the result of the “dynamical universe paradigm,” the idea that reality fundamentally comprises physical entities that evolve in time from some initial state according to dynamical laws. Thus, in the dynamical universe, the initial conditions plus the dynamical laws explain everything else going exclusively forward in time. In cosmology, for example, the initial conditions reside in the Big Bang and the dynamical law is supplied by general relativity. Accordingly, the present state of the universe is explained exclusively by its past. A completely new paradigm (called Relational Blockworld) is offered here whereby the past, present, and future co-determine each other via “adynamical global constraints,” such as the least action principle. Accordingly, the future is just as important for explaining the present as the past is. Most of the book is devoted to showing how Relational Blockworld resolves many of the current conundrums of both theoretical physics and foundations of physics, including the mystery of time as experienced and how that experience relates to the block universe.

Introduction

2018 ◽  
Author(s):  
Michael Silberstein ◽  
W.M. Stuckey ◽  
Timothy McDevitt
Keyword(s):  
Physical Reality ◽  
Theoretical Physics ◽  
Global Constraints ◽  
Least Action Principle ◽  
Least Action ◽  
The Past ◽  
The Least Action Principle ◽  
Foundations Of Physics ◽  
Block Universe

Chapter 1 contrasts dynamical explanation in the mechanical universe (Wilczek’s “ant’s-eye view of physical reality”) with adynamical explanation in the block universe (Wilczek’s “God’s-eye view of physical reality”). In the dynamical universe, explanation resides in fundamental laws that evolve initial states in time. Accordingly, the present is explained by the past alone. In the adynamical block universe, explanation resides in adynamical global constraints over spacetime such as the least action principle. Accordingly, the past and future are equally important in explaining the present. After introducing the impasse of theoretical physics and foundations of physics, the blame for that impasse is placed squarely with the ant’s-eye view. The chapter concludes with a brief preview of how the God’s-eye view can resolve the impasse of theoretical physics and foundations of physics created by the ant’s-eye view, including the mystery of time as experienced and how that experience relates to the block universe.

scholarly journals REPARAMETRIZATION-INVARIANT PATH INTEGRAL IN GR AND "BIG BANG" OF QUANTUM UNIVERSE

2001 ◽  
Vol 16 (10) ◽  
pp. 1715-1742 ◽  
Author(s):  
M. PAWLOWSKI ◽  
V. N. PERVUSHIN
Keyword(s):  
General Relativity ◽  
Initial Conditions ◽  
Equations Of Motion ◽  
Big Bang ◽  
Constrained System ◽  
Generating Functional ◽  
Finite Space ◽  
Creation Of Matter ◽  
The Big Bang ◽  
Friedmann Robertson Walker

The reparametrization-invariant generating functional for the unitary and causal perturbation theory in general relativity in a finite space–time is obtained. The region of validity of the Faddeev–Popov–DeWitt functional is studied. It is shown that the invariant content of general relativity as a constrained system can be covered by two "equivalent" unconstrained systems: the "dynamic" (with "dynamic" evolution parameter as the metric scale factor) and "geometric" (given by the Levi–Civita type canonical transformation to the action-angle variables where the energy constraint converts into a new momentum). "Big Bang," the Hubble evolution, and creation of matter fields by the "geometric" vacuum are described by the inverted Levi–Civita transformation of the geomeric system into the dynamic one. The particular case of the Levi–Civita transformations are the Bogoliubov ones of the particle variables (diagonalizing the dynamic Hamiltonian) to the quasiparticles (diagonalizing the equations of motion). The choice of initial conditions for the "Big Bang" in the form of the Bogoliubov (squeezed) vacuum reproduces all stages of the evolution of the Friedmann–Robertson–Walker universe in their conformal (Hoyle–Narlikar) versions.

The Block Universe from Special Relativity

2018 ◽  
Author(s):  
Michael Silberstein ◽  
W.M. Stuckey ◽  
Timothy McDevitt
Keyword(s):  
Special Relativity ◽  
Time Dilation ◽  
Theoretical Physics ◽  
Philosophy Of Physics ◽  
Lorentz Transformations ◽  
The Past ◽  
Length Contraction ◽  
Foundations Of Physics ◽  
Main Thread ◽  
Block Universe

Before explaining how the God’s-eye view resolves the impasse of theoretical physics and foundations of physics created by the ant’s-eye view, the book presents a detailed argument for the block universe. Accordingly, the main thread of chapter 2 shows how the relativity of simultaneity resolves the paradoxes associated with time dilation and length contraction that result from special relativity. A short argument is then presented showing how the relativity of simultaneity implies a block universe, that is, the co-reality or co-existence of the past, present, and future. Philosophy of Physics for Chapter 2 provides a detailed argument for block universe, taking into account all counterarguments and assumptions of the abridged argument in the main thread. Foundational Physics for Chapter 2 shows how the second postulate of special relativity leads to time dilation and length contraction, and it contains the Lorentz transformations for the spacetime events used in the main thread.

scholarly journals The Early Growth of the First Black Holes

2016 ◽  
Vol 33 ◽  
Author(s):  
Jarrett L. Johnson ◽  
Francesco Haardt
Keyword(s):  
Black Holes ◽  
Large Scale ◽  
Initial Conditions ◽  
Big Bang ◽  
Massive Black Holes ◽  
The Past ◽  
Stages Of Growth ◽  
The Big Bang ◽  
Large Scale Simulations ◽  
Cosmic History

AbstractWith detections of quasars powered by increasingly massive black holes at increasingly early times in cosmic history over the past decade, there has been correspondingly rapid progress made on the theory of early black hole formation and growth. Here, we review the emerging picture of how the first massive black holes formed from the primordial gas and then grew to supermassive scales. We discuss the initial conditions for the formation of the progenitors of these seed black holes, the factors dictating the initial masses with which they form, and their initial stages of growth via accretion, which may occur at super-Eddington rates. Finally, we briefly discuss how these results connect to large-scale simulations of the growth of supermassive black holes in the first billion years after the Big Bang.

On the formation of a New Paradigm of fiscal Policy

2013 ◽  
pp. 152-158 ◽  
Author(s):  
V. Senchagov
Keyword(s):  
Public Finance ◽  
Fiscal Policy ◽  
Financial Crisis ◽  
Global Financial Crisis ◽  
Domestic Demand ◽  
Real Economy ◽  
New Paradigm ◽  
Monetary Aggregate ◽  
The Past ◽  
The Global Financial Crisis

Due to Russia’s exit from the global financial crisis, the fiscal policy of withdrawing windfall spending has exhausted its potential. It is important to refocus public finance to the real economy and the expansion of domestic demand. For this goal there is sufficient, but not realized financial potential. The increase in fiscal spending in these areas is unlikely to lead to higher inflation, given its actual trend in the past decade relative to M2 monetary aggregate, but will directly affect the investment component of many underdeveloped sectors, as well as the volume of domestic production and consumer demand.

Periodontopathogens: a new view. Systematic review. Part 2

2020 ◽  
Vol 20 (2) ◽  
pp. 160-167
Author(s):  
E. S. Slazhneva ◽  
E. A. Tikhomirova ◽  
V. G. Atrushkevich
Keyword(s):  
Systematic Review ◽  
Periodontal Disease ◽  
Pathogenic Bacteria ◽  
Periodontal Diseases ◽  
Oral Microbiome ◽  
Controlled Trials ◽  
New Paradigm ◽  
Microbial Composition ◽  
Randomized Controlled ◽  
The Past

Relevance. The modern view of periodontitis as a dysbiotic disease that occurs as a result of changes in the microbial composition of the subgingival region is considered in a systematic review.Purpose. To study a new paradigm of development of generalized periodontitis.Materials and methods. Randomized controlled trials (RCTS) were selected for the study, including cluster RCTS, controlled (non-randomized) microbiological and clinical studies of the oral microbiome in adult patients with generalized periodontitis over the past 10 years.Results. The transition from a symbiotic microflora to a dysbiotic pathogenic community triggers the host's inflammatory response, which contributes to the development of periodontal diseases. Modern ideas about periodontal pathogenic bacteria dictate new requirements for the treatment of periodontal diseases. The second part of the review examines the microbial profiles of periodontal disease in various nosological forms, the mechanisms of the immune response and approaches to the treatment of periodontal disease from the perspective of biofilm infection.Conclusions. As follows from modern literature periodontitis is to a certain extent caused by the transition from a harmonious symbiotic bacterial community to a dysbiotic one. Recent scientific studies have shown that not single microorganism is not able to cause disease but the microbial community as a whole leads to the development of pathology.

Enzyme-Instructed Self-assembly in Biological Milieu for Theranostics Purpose

2019 ◽  
Vol 26 (8) ◽  
pp. 1351-1365 ◽  
Author(s):  
Zhentao Huang ◽  
Qingxin Yao ◽  
Simin Wei ◽  
Jiali Chen ◽  
Yuan Gao
Keyword(s):  
Small Molecules ◽  
Precision Medicine ◽  
Self Assembly ◽  
Public Healthcare ◽  
Enzymatic Conversion ◽  
Vaccine Adjuvants ◽  
New Paradigm ◽  
Cancer Treatments ◽  
The Past ◽  
Biological Milieu

Precision medicine is in an urgent need for public healthcare. Among the past several decades, the flourishing development in nanotechnology significantly advances the realization of precision nanomedicine. Comparing to well-documented nanoparticlebased strategy, in this review, we focus on the strategy using enzyme instructed selfassembly (EISA) in biological milieu for theranostics purpose. In principle, the design of small molecules for EISA requires two aspects: (1) the substrate of enzyme of interest; and (2) self-assembly potency after enzymatic conversion. This strategy has shown its irreplaceable advantages in nanomedicne, specifically for cancer treatments and Vaccine Adjuvants. Interestingly, all the reported examples rely on only one kind of enzymehydrolase. Therefore, we envision that the application of EISA strategy just begins and will lead to a new paradigm in nanomedicine.

Integrability: From Statistical Systems to Gauge Theory

2019 ◽  
Keyword(s):  
Field Theory ◽  
Gauge Theory ◽  
Summer School ◽  
Condensed Matter ◽  
Theoretical Physics ◽  
Conformal Field ◽  
The Past ◽  
Background Material ◽  
Supersymmetric Gauge ◽  
Statistical Systems

This volume contains lectures delivered at the Les Houches Summer School ‘Integrability: from statistical systems to gauge theory’ held in June 2016. The School was focussed on applications of integrability to supersymmetric gauge and string theory, a subject of high and increasing interest in the mathematical and theoretical physics communities over the past decade. Relevant background material was also covered, with lecture series introducing the main concepts and techniques relevant to modern approaches to integrability, conformal field theory, scattering amplitudes, and gauge/string duality. The book will be useful not only to those working directly on integrablility in string and guage theories, but also to researchers in related areas of condensed matter physics and statistical mechanics.

Beyond the Schwarzschild Metric

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Gravitational Waves ◽  
Test Particle ◽  
Direct Detection ◽  
Relativistic Effects ◽  
Big Bang ◽  
Clusters Of Galaxies ◽  
General Relativistic ◽  
The Universe

General relativity explains much more than the spacetime around static spherical masses.We briefly assess general relativity in the larger context of physical theories, then explore various general relativistic effects that have no Newtonian analog. First, source massmotion gives rise to gravitomagnetic effects on test particles.These effects also depend on the velocity of the test particle, which has substantial implications for orbits around black holes to be further explored in Chapter 20. Second, any changes in the sourcemass ripple outward as gravitational waves, and we tell the century‐long story from the prediction of gravitational waves to their first direct detection in 2015. Third, the deflection of light by galaxies and clusters of galaxies allows us to map the amount and distribution of mass in the universe in astonishing detail. Finally, general relativity enables modeling the universe as a whole, and we explore the resulting Big Bang cosmology.

scholarly journals Handling Initial Conditions in Vector Fitting for Real Time Modeling of Power System Dynamics

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2471
Author(s):  
Tommaso Bradde ◽  
Samuel Chevalier ◽  
Marco De Stefano ◽  
Stefano Grivet-Talocia ◽  
Luca Daniel
Keyword(s):  
Dynamical Systems ◽  
Power System ◽  
System Dynamics ◽  
Real Time ◽  
Initial Conditions ◽  
Test System ◽  
Initial State ◽  
Power System Dynamics ◽  
Vector Fitting ◽  
Time Modeling

This paper develops a predictive modeling algorithm, denoted as Real-Time Vector Fitting (RTVF), which is capable of approximating the real-time linearized dynamics of multi-input multi-output (MIMO) dynamical systems via rational transfer function matrices. Based on a generalization of the well-known Time-Domain Vector Fitting (TDVF) algorithm, RTVF is suitable for online modeling of dynamical systems which experience both initial-state decay contributions in the measured output signals and concurrently active input signals. These adaptations were specifically contrived to meet the needs currently present in the electrical power systems community, where real-time modeling of low frequency power system dynamics is becoming an increasingly coveted tool by power system operators. After introducing and validating the RTVF scheme on synthetic test cases, this paper presents a series of numerical tests on high-order closed-loop generator systems in the IEEE 39-bus test system.

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