Results 231 to 240 of about 13,304 (249)

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

open access: yesPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 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.
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Entropy, Complexity, and the Arrow of Time

2019
Thermodynamic Entropy. Statistical Entropy. Order, Entropy and Complexity. Entropy and gravitating systems.
openaire   +1 more source

The Arrow of Time, Entropy and the Expansion of the Universe

1976
Setting aside the guidance of consciousness, we discover a signpost for time in the physical world itself. The signpost is a rather peculiar one, and I would not venture to say that the discovery of the signpost amounts to the same thing as the discovery of an objective ‘going on of time’ in the universe.
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Vacuum Radiation, Entropy and the Arrow Of Time

2002
The root mean square perturbations on particles produced by vacuum radiation must be limited by the uncertainty principle, i.e., 1/2 1/2 =ħ/2, where 1/2 and 1/2 are the root mean square values of drift in spatial and momentum coordinates. The value 1/2 =(ħt/m) 1/2 , where m is the mass of the particle, can be obtained both from classical SED ...
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From Randomness and Entropy to the Arrow of Time

The Element reconstructs, analyses and compares different derivational routes to a grounding of the Arrow of Time in entropy. It also evaluates the link between entropy and visible disorder, and the related claim of an alignment of the Arrow of Time with a development from order to visible disorder.
openaire   +2 more sources

Macroscopic laws, microscopic dynamics, time's arrow and Boltzmann's entropy

Physica A: Statistical Mechanics and its Applications, 1993
Abstract I discuss Boltzmann's resolution of the apparent paradox: microscopic dynamics are time-symmetric but the behavior of macroscopic objects, composed of microscopic constituents, is time-asymmetric. Noting the great disparity between macroscales and microscales Boltzmann developed a statistical approach which explains the observed macroscopic ...
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Is Boltzmann Entropy Time's Arrow's Archer?

Physics Today, 1994
Howard Barnum   +9 more
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Perception, Cognition and Thought: Part V Entropy, the Arrow of Time and the Present

Cancer Investigation, 2023
Gary H. Lyman   +2 more
openaire   +2 more sources

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