Results 231 to 240 of about 14,076 (249)

Fractals, Entropy and the Arrow of Time

2016
Why can we not move backward in time? According to Relativity, time is just one more dimension like length, width and height where we can go as easily backward as forward. What makes time special? Newton’s laws are symmetric in time and so is even Schrodinger’s equation which controls the happenings at the quantum level.
Mauri Valtonen, Joanna Anosova, Konstantin Kholshevnikov, Aleksandr Mylläri, Victor Orlov, Kiyotaka Tanikawa   +5 more
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Boltzmann's Entropy and Time's Arrow

Physics Today, 1993
Given the success of Ludwig Boltzmann's statistical approach in explaining the observed irreversible behavior of macroscopic systems in a manner consistent with their reversible microscopic dynamics, it is quite surprising that there is still so much confusion about the problem of irreversibility.
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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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Entropy, Complexity, and the Arrow of Time

2019
Thermodynamic Entropy. Statistical Entropy. Order, Entropy and Complexity. Entropy and gravitating systems.
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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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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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Defining Arrow of Time at the Start of Inflation by Expansion of Entropy in a Taylor Series and Examining Initial Conditions

Journal of High Energy Physics Gravitation and Cosmology, 2021
Andrew Beckwith
exaly  

Is Boltzmann Entropy Time's Arrow's Archer?

Physics Today, 1994
Howard Barnum, Carlton M. Caves, Christopher Fuchs, Rüdiger Schack, Dean J. Driebe, William G. Hoover, Harald Posch, Brad Lee Holian, Rudolf Peierls, Joel L. Lebowitz   +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, Christopher H. Lyman, Nicole M. Kuderer   +2 more
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Quantum Causality and the Arrows of Time and Thermodynamics

Progress in Particle and Nuclear Physics, 2020
John Francis Donoghue, Gabriel Menezes
exaly