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Huw Price
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
⌃
Protagonists
Protagonists☜A number of philosophers and scientists are cited in this map, and separate nodes for each are appended. When you click on one of these nodes cross-links are displayed connecting to other nodes anywhere in the map where the person is cited. Follow the links to explore further.☜D3B8AB
⌃
Philosophers
Philosophers☜☜D3B8AB
■
Huw Price
Huw Price☜☜D3B8AB
⇤
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.☜FFFACD
⇤
The experience of time
The experience of time☜This branch of the map considers the phenomenology of time - the various ways in which time presents itself directly to our consciousness. Why do we think time has the features indicated by the passage view? The answers will hopefully enable us to connect the phenomenological to the physical.☜FFFACD
⇤
Why do we see an entropy gradient?
Why do we see an entropy gradient?☜We find ourselves in an observable universe in which entropy increases consistently in one direction, thereby showing time asymmetry - an arrow of time. Yet the vast majority of underlying dynamical processes are time-symmetric. How to account for this? Two broad approaches are considered here.☜FFFACD
⇤
Bolztmann's H-theorem
Bolztmann's H-theorem☜In his H-theorem Boltzmann tried to formally prove that inter-molecular collisions drive gases toward equilibrium, confirming the Second Law (for gases at least). In this approach, he aimed show that it is not just overwhelmingly probable but an exceptionless law like conservation of energy.☜FFFACD
⇤
Assumption of molecular chaos
Assumption of molecular chaos☜The H-theorem is invalidated by its reliance on a time-asymmetric assumption: the Stosszahlansatz (assumption of molecular chaos). This is the assumption that probabilities of velocities of colliding particles are independent.☜FFFACD
⇤
Neutral Kaon exception
Neutral Kaon exception☜The behavior of a particle called the neutral Kaon provides an exception to the generalization that physical processes are time-symmetric AND this asymmetry may account for the time-asymmetry expressed by the Second Law of Thermodynamics.☜FFFACD
⇤
Anti-matter objection
Anti-matter objection☜If the time-asymmetry of thermodynamics were associated with the symmetry violation of the neutral K meson (neutral Kaon) then anti-matter would show the reverse of the normal thermodynamic asymmetry AND no such anti-matter reversal is apparent.☜FFFACD
⇤
Past hypothesis
Past hypothesis☜We inhabit a universe - or part thereof - characterized by a low-entropy past that has enabled the evolution of intelligent observers to occur. This together with Boltzmanns probabilistic argument (see sibling node) implies entropy will increase over time toward thermal equilibrium.☜FFFACD
⇤
Ontological cost
Ontological cost☜Huw Price notes that anthropic reasoning that appeals to some form of multiverse cosmology requires us to posit that much more exists than we are ordinarily aware of - that it has a huge ontological cost - and that we should therefore look for less costly explanations.☜FFFACD
⇤
Boltzmann-Schuetz hypothesis
Boltzmann-Schuetz hypothesis☜Boltzmann and Schuetz claimed that in a universe that is near thermal equilibrium, and given sufficient time, there will be regions where there is a temporary deviation into a low entropy state, from which it will trend back to equilibrium. Anthropic selection accounts for us being in such a region.☜FFFACD
□
Arthur N. Prior
Arthur N. Prior☜☜D3B8AB
□
Bradley Dowden
Bradley Dowden☜☜D3B8AB
□
Craig Callender
Craig Callender☜☜D3B8AB
□
David Wallace
David Wallace☜☜D3B8AB
□
H.W. Carr
H.W. Carr☜☜D3B8AB
□
Heather Dyke
Heather Dyke☜☜D3B8AB
□
Jesus Mosterin
Jesus Mosterin☜☜D3B8AB
□
JJC Smart
JJC Smart☜☜D3B8AB
□
John Earman
John Earman☜☜D3B8AB
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Nataša Rakić
Nataša Rakić☜☜D3B8AB
□
Nathan L. Oaklander
Nathan L. Oaklander☜☜D3B8AB
□
Robert Le Poidevin
Robert Le Poidevin☜☜D3B8AB
□
Simon Prosser
Simon Prosser☜☜D3B8AB
□
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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#115276
Node type:
Protagonist
Entry date (GMT):
8/12/2011 6:33:00 AM
Last edit date (GMT):
8/12/2011 6:33:00 AM
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