Results 21 to 30 of about 56,484 (222)

Memory Systems, the Epistemic Arrow of Time, and the Second Law [PDF]

open access: yesEntropy, 2023
The epistemic arrow of time is the fact that our knowledge of the past seems to be both of a different kind and more detailed than our knowledge of the future. Just like with the other arrows of time, it has often been speculated that the epistemic arrow
David H. Wolpert, Jens Kipper
doaj   +2 more sources

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

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

How to obtain initial degrees of freedom for the early universe of about 1000, instead of 100, while preserving a uniformly increasing arrow of time due to entropy increase

open access: goldJournal of Physics: Conference Series, 2019
Using the Klauder enhanced quantization to specify the cosmological constant as a baseline for the mass of a graviton, we eventually develop with an initial degrees of freedom argument of about 1000, instead of 100 or so, implying no quantum fluctuations
Andrew Beckwith
openalex   +2 more sources

Pre-bangian origin of our entropy and time arrow [PDF]

open access: green, 1999
I argue that, in the chaotic version of string cosmology proposed recently, classical and quantum effects generate, at the time of exit to radiation, the correct amount of entropy to saturate a Hubble (or holography) entropy bound (HEB) and to identify ...
Veneziano, G.
core   +4 more sources

Is the hypothesis about a low entropy initial state of the Universe necessary for explaining the arrow of time? [PDF]

open access: green, 2016
According to statistical mechanics, micro-states of an isolated physical system (say, a gas in a box) at time t0 in a given macro-state of less-than-maximal entropy typically evolve in such a way that the entropy at time t increases with jt t0j in both ...
Sheldon Goldstein   +2 more
openalex   +3 more sources

Entropy, biological evolution and the psychological arrow of time [PDF]

open access: green, 2014
We argue that in Universes where future and past differ only by the entropy content a psychological arrow of time pointing in the direction of entropy increase can arise from natural selection in biological evolution.
Torsten Heinrich   +2 more
semanticscholar   +4 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   +4 more sources

Perception, Cognition and Thought: Part V Entropy, the Arrow of Time and the Present [PDF]

open access: bronzeCancer Investigation, 2023
Gary H. Lyman   +2 more
openalex   +2 more sources

Entropy and the arrow of time in population dynamics [PDF]

open access: greenBiosyst., 2022
Diogo Costa-Cabanas   +2 more
semanticscholar   +4 more sources

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