Results 11 to 20 of about 72,650 (303)

Gravitational Entropy and the Second Law of Thermodynamics [PDF]

open access: yesEntropy, 2015
The spontaneous violation of Lorentz and diffeomorphism invariance in a phase near the big bang lowers the entropy, allowing for an arrow of time and the second law of thermodynamics. The spontaneous symmetry breaking leads to
John W. Moffat
doaj   +5 more sources

Pre-Big-Bang Black-Hole Remnants and Past Low Entropy

open access: yesUniverse, 2018
Dark matter could be composed by black-hole remnants formed before the big-bang era in a bouncing cosmology. This hypothetical scenario has implications on the issue of the arrow of time: it upsets a common attribution of past low entropy to the state of
Carlo Rovelli, Francesca Vidotto
doaj   +5 more sources

Temporal Asymmetry, Entropic Irreversibility, and Finite-Time Thermodynamics: From Parmenides–Einstein Time-Reversal Symmetry to the Heraclitan Entropic Arrow of Time [PDF]

open access: goldEntropy, 2012
In this paper, we combine the two universalisms of thermodynamics and dynamical systems theory to develop a dynamical system formalism for classical thermodynamics. Specifically, using a compartmental dynamical system energy flow model we develop a state-
Wassim M. Haddad
doaj   +2 more sources

Beyond the Arrow of Time: Can There Be a Relation between the Measurement of Entropy and Time? [PDF]

open access: yesProceedings, 2017
The general tendency of the entropy of an isolated to increase is considered to be directly linked to the direction of the flow of time. This raises the question whether a quantitative relation can be established such that a time interval can be measured
Ben Akih-Kumgeh
doaj   +2 more sources

Modeling Time’s Arrow

open access: yesEntropy, 2012
Quantum gravity, the initial low entropy state of the Universe, and the problem of time are interlocking puzzles. In this article, we address the origin of the arrow of time from a cosmological perspective motivated by a novel approach to quantum ...
Djordje Minic   +3 more
doaj   +4 more sources

Entropy Maximization, Time Emergence, and Phase Transition [PDF]

open access: yesEntropy
We survey developments in the use of entropy maximization for applying the Gibbs Canonical Ensemble to finite situations. Biological insights are invoked along with physical considerations.
Jonathan Smith
doaj   +2 more sources

The Arrow of Time under Space-Time-Entropy Mapping Model

open access: green
ABSTRACT: This study introduces a discrete Time-Entropy Mapping Model (1)where entropy is defined through multiplicative accumulation , rigorously satisfying entropy increase ΔS>0 while maintaining logarithmic consistency with conventional entropy.
Zou Zhi kai
openalex   +3 more sources

Unified Framework of the Arrow of Time and Entropy Flow in Rigid Fractal Structures

open access: gold
This paper proposes a novel model of the nature of time, positing that time is a dynamic manifestation embedded within rigid fractal geometry. Based on this model, the directionality of time (the arrow of time) and the flow of entropy (the second law of thermodynamics) are unified as natural outcomes of recursive dynamics in fractal geometry.
changzheng zhou, ZIQING zhou
openalex   +2 more sources

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