Pre-bangian origin of our entropy and time arrow [PDF]
Physics Letters B, 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, within our own Universe, the arrow of time.
G. Veneziano
core +7 more sources
The maximum entropy ansatz in the absence of a time arrow: fractional pole models
, 2006 18 pages, 3 ...
Tryphon T. Georgiou
core +6 more sources
Gravitational Entropy and the Second Law of Thermodynamics [PDF]
Entropy, 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
Universe, 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
Complex Time Approach to the Hamiltonian and the Entropy Production of the Damped Harmonic Oscillator [PDF]
EntropyThe present work applies and extends the previously developed Quantitative Geometrical Thermodynamics (QGT) formalism to the derivation of a Hamiltonian for the damped harmonic oscillator (DHO) across all damping regimes.
Kyriaki-Evangelia Aslani
doaj +2 more sources
Two Types of Temporal Symmetry in the Laws of Nature [PDF]
EntropyThis work explores the implications of assuming time symmetry and applying bridge-type, time-symmetric temporal boundary conditions to deterministic laws of nature with random components.
A. Y. Klimenko
doaj +2 more sources
Comment on "Entropy production and the arrow of time"
, 2007 J.M.R. Parrondo at al. in arXiv:0904.1573 continue numerous efforts to unify the concepts of the arrow of time and entropy production with the concept of time invariance in physics. This is a wrong way.
V. A. Kuz’menko
openalex +4 more sources
The Maximum Entropy Principle in the Absence of a Time-Arrow: Fractional-Pole Models [PDF]
IEEE Transactions on Information Theory, 2007 The maximum entropy (ME) principle, as it is often invoked in the context of time-series analysis, suggests the selection of a power spectrum which is consistent with autocorrelation data and corresponds to a random process least predictable from past observations. We introduce and compare a class of spectra with the property that the underlying random
Tryphon T. Georgiou
openalex +3 more sources
Arrow of time: Metaphorical construals of entropy and the second law of thermodynamics
Science Education, 2012 AbstractVarious features of scientific discourse have been characterized in the science education literature, and challenges students face in appropriating these features have been explored. Using the framework of conceptual metaphor, this paper sought to identify explicit and implicit metaphors in pedagogical texts dealing with the concept of entropy ...
Tamer G. Amin +3 more
openalex +6 more sources
Is the hypothesis about a low entropy initial state of the Universe necessary for explaining the arrow of time? [PDF]
Physical Review D, 2016 14 pages LaTeX, 3 figures; v2: first paragraph added, section 8 added, 9 references added; v3: further references ...
Sheldon Goldstein +2 more
openalex +6 more sources