Results 31 to 40 of about 72,568 (270)

Irreversibility of time in general relativity [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Физика, 2022
Background and Objectives: The equations of classical dynamics of particles and waves admit solutions with the reverse flow of time. Therefore, it is generally assumed that classical dynamics does not reflect the irreversibility of time.
Tsoy, Valery Ivanovich
doaj   +1 more source

Black-Hole Uncertainty Entails an Intrinsic Time Arrow. a Note on the Hawking-Penrose Controversy [PDF]

open access: yes, 1999
Any theory that states that the basic laws of physics are time-symmetric must be strictly deterministic. Only determinism enables time reversal of entropy increase. A contradiction therefore arises between two statements of Hawking.
't Hooft   +21 more
core   +4 more sources

Comment on `Quantum resolution to the arrow of time dilemma' [PDF]

open access: yes, 2009
Recently, a substantial amount of debate has grown up around a proposed quantum resolution to the `arrow of time dilemma' that is based on the role of classical memory records of entropy-decreasing events.
Jennings, David, Rudolph, Terry
core   +2 more sources

The holographic space-time and black hole remnants as dark matter

open access: yesPhysics Letters B, 2022
The holographic space-time approach to inflation provides a well defined and self-contained framework to study the early universe. Based on a quasi-local quantum gravity theory generalizing string theory beyond AdS backgrounds, it addresses fundamental ...
Aurélien Barrau
doaj   +1 more source

Entropic Dynamics, Time and Quantum Theory [PDF]

open access: yes, 2011
Quantum mechanics is derived as an application of the method of maximum entropy. No appeal is made to any underlying classical action principle whether deterministic or stochastic.
't Hooft G G   +32 more
core   +1 more source

About some Entropy Aspects of Dissipative Systems [PDF]

open access: yesTheoretical and Applied Economics, 2006
This paper is aspiring to get a logical explanation on the entropy velocity (i.e. on the entropy acceleration) in a Universe “endowed” with a dissipative system.
Emil Dinga
doaj   +1 more source

Vacuum Structure and the Arrow of Time

open access: yes, 2012
We find ourselves in an extended era of entropy production. Unlike most other observations, the arrow of time is usually regarded as a constraint on initial conditions. I argue, however, that it primarily constrains the vacuum structure of the theory.
A. Linde   +4 more
core   +2 more sources

Irreversibility and the arrow of time in a quenched quantum system [PDF]

open access: yes, 2015
Irreversibility is one of the most intriguing concepts in physics. While microscopic physical laws are perfectly reversible, macroscopic average behavior has a preferred direction of time. According to the second law of thermodynamics, this arrow of time
Batalhao, T. B.   +6 more
core   +2 more sources

Entropy and Cosmological Arrows of Time

open access: yes, 2021
Deutsch and Aguirre have recently shown that the solutions of certain dynamical systems typically contain a point of minimum size that they identify as an entropy minimum and from which the size and entropy increase to infinity in both directions of time.
openaire   +2 more sources

Entanglement and the Thermodynamic Arrow of Time [PDF]

open access: yes, 2010
We discuss quantum entanglement in the context of the thermodynamic arrow of time. We review the role of correlations in entropy-decreasing events and prove that the occurrence of a transformation between two thermodynamic states constitutes a new type ...
A. Peres   +7 more
core   +2 more sources

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