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Cosmological arrow is basic
The cosmological arrow is more fundamental than the thermodynamic arrow.
RELATED ARTICLES
Explain
⌅
The Arrow of Time
The Arrow of Time ☜A map exploring some issues concerning the nature of time that lie at the boundary of physics and philosophy. The map follows up a talk to the Blackheath Philosophy Forum on 2 April 2011 by Huw Price, Professor of Philosophy and director of the Center for Time at Sydney University.☜F1CEB7
⌃
The physics of time
The physics of time☜Is our subjective sense that time has a direction from past to future reflected in impersonal physical processes and laws? Is it better - from the impersonal viewpoint - to look asymmetries in time rather than a direction (to the future) of time?☜FFB597
⌃
Which arrow is fundamental?
Which arrow is fundamental?☜How are the different physical time arrows related? Is there one master arrow that gives rise to the others. The two main candidates - the cosmological and thermodynamic arrows - are considered below.☜FFB597
■
Cosmological arrow is basic
Cosmological arrow is basic☜The cosmological arrow is more fundamental than the thermodynamic arrow.☜59C6EF
↳
Priority of spacetime geometry
Priority of spacetime geometry☜The authors of the paper cited below claim that it is possible to define a cosmological arrow of time in a way that does not need to be reduced to non-temporal considerations - that is an intrinsic feature of spacetime, and which therefore has conceptual priority over the entropic approach.☜98CE71
⇤
The cosmological arrow
The cosmological arrow☜The cosmological arrow of time refers to the direction of time in which the universe is expanding. Generally considered to be closely related to the thermodynamic arrow.☜FFFACD
□
Other arrows
Other arrows☜A number of additional physical time arrows have been identified: the radiative arrow, the causal arrow, the particle physics (weak) arrow, the quantum arrow. Our main focus is the thermodynamic and cosmological arrows - these other arrows are included for completeness.☜FFB597
□
Thermodynamic arrow is basic
Thermodynamic arrow is basic☜The thermodynamic arrow is the basic arrow, and gives rise to the others.☜59C6EF
□
Graph of this discussion
Graph of this discussion☜Click this to see the whole debate, excluding comments, in graphical form☜dcdcdc
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Peter Baldwin
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Entry date (GMT):
5/19/2011 4:21:00 AM
Last edit date (GMT):
5/19/2011 4:42:00 AM
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