Teleology without teleology
1 / 44

a nBoamnnnnnnnnn n - PowerPoint PPT Presentation

  • Uploaded on

Teleology without teleology Paul Davies Beyond Center for Fundamental Concepts in Science Arizona State University Origin of the universe c. 2 billion years c. 10 billion years c. 13.7 billion years Law of increasing (accelerating) novelty/variety/diversity/complexity

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'a nBoamnnnnnnnnn n' - lotus

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Slide1 l.jpg
Teleology without teleologyPaul DaviesBeyond Center for Fundamental Concepts in ScienceArizona State University

Slide9 l.jpg

Law of increasing (accelerating)


The principle of maximum diversity says that the laws of nature, and the initial

conditions at the beginning of time, are such as to make the universe

as interesting as possible.

Freeman Dyson

Biospheres and the universe create novelty and diversity as fast as they can

manage to do so without destroying the accumulated propagating organization

that is the basis and nexus from which further novelty is discovered and

incorporated into the propagating organization.

Stuart Kauffman

Slide14 l.jpg

Cosmic expansion itself is the prime mover for the construction

of a hierarchy of complex entities throughout the Universe…

in an expanding Universe, both the disorder and the order can

increase simultaneously--a fundamental duality, strange but true.

Eric Chaisson

Compatibility explanation l.jpg
compatibility construction≠ explanation

Questions l.jpg
Questions construction

  • What is a suitable quantification for the entity that increases, and under what physical circumstances does it in fact increase?

  • Does the putative “law” or principle of incraesing “something” emerge from existing laws of physics or does it augment them?

  • Is there a universal principle in nature or a patchwork of different principles for different sorts of systems (gravitational, biological, intelligent…)

Slide17 l.jpg

Gravitation: construction

the key!

Initial state of matter close to thermodynamic equilibrium

Initial state of the gravitational field far from equilibrium

Gravitational entropy l.jpg
Gravitational entropy construction

Growth of clumpiness l.jpg
Growth of clumpiness construction

Slide20 l.jpg

Perhaps to a black hole… construction

Sbh = 4πkGM2/ћc3

Slide21 l.jpg

S constructionafter ≥ Sbefore

‘Gravitational entropy: beyond the black hole’

P.C.W. Davies, D.N. Page and L.H. Ford, Phys. Rev. D34, 1700 (1986).

Slide22 l.jpg

'Black hole versus cosmological horizon entropy,’ construction

P.C.W. Davies, T. M. Davis and C. Lineweaver, Classical and Quantum Gravity20, 2753 (2003).

Radiation filled universe with l.jpg
Radiation-filled construction universe with Λ


a(t) sinh½[2(Λ/3)½t]


Rh ~ t½ t → 0

→ (3/Λ)½t → ∞

S~Λ–¾ → Λ–1

Λ–¼ ~ (Rh/Planck length)½ >> 1


Gravitational entropy or complexity l.jpg
Gravitational entropy – constructionor complexity?



Is there a complexity bound on the universe towards which the growth of complexity might tend l.jpg
Is there a complexity bound on the universe towards which the growth of complexity might tend?

Slide27 l.jpg

The universe has the growth of complexity might tend?finite

computational resources

I ≤ 2πkER/ħc

10122 bits

Slide28 l.jpg

A possible experimental test! the growth of complexity might tend?

n particles → 2n possible states

2n~ 10122 → n ~ 400 particles

Holographic bound on algorithmic complexity l.jpg
Holographic bound on algorithmic complexity the growth of complexity might tend?

H(X) = – ln P(X) + O(1)

algorithmic information

H({α}) < Aholo/LP2

Scott Aaronson

Slide30 l.jpg

“No room at the bottom” the growth of complexity might tend?

argument against strong emergence

The laws of physics at the micro-level

already completely determine the

evolution of physical states

Additional emergent laws would lead to


Emergent laws of complexity l.jpg
Emergent laws of complexity the growth of complexity might tend?

The problem of causal closure

Complex system

Emergent laws

of complexity

“Downward causation”



Basic laws

of physics

Quantum post selection and the born rule l.jpg
Quantum post-selection and the Born rule the growth of complexity might tend?

Pre-selection, no post-selection Born rule

Pre-selection, “weird” post-selection

“strange” departures from Born rule

Three examples:

1. Departures at high energy (“natural” regulation?)

2. Time-symmetric boundary conditions

(Gell-Man & Hartle – teleology with teleology)

3. Growth of complexity/diversity

Slide33 l.jpg

Exponential decay law the growth of complexity might tend?

Slide34 l.jpg

The pattern hidden inside the exponential decay the growth of complexity might tend?

law, revealed by weak measurement


This generalized law is

experimentally testable

Wheeler’s “turning of the tide”






Post selection l.jpg
Post-selection the growth of complexity might tend?

Pre-selection (e.g. de Sitter vacuum)

Biological determinism l.jpg
Biological determinism the growth of complexity might tend?

Life as a ‘cosmic imperative’


Slide37 l.jpg

Christian De Duve the growth of complexity might tend?

“Life is almost bound to arise… wherever

physical conditions are similar (to Earth).”

“Life is a cosmic imperative!”

Multiple origins of life on Earth!

Seek evidence from a shadow biosphere

Founding tenet of astrobiology l.jpg
Founding tenet of astrobiology the growth of complexity might tend?

Life emerges readily under earthlike conditions

Earthlike planets are common,


Life is widespread in the universe

Slide39 l.jpg

3.5 billion year ago the growth of complexity might tend?


Slide40 l.jpg

S the growth of complexity might tend?earch for Extra-



Slide42 l.jpg

Stephen Jay Gould the growth of complexity might tend?



Conclusions l.jpg
Conclusions the growth of complexity might tend?

  • There is no agreed universal measure of what it is “of value” that increases with time.

  • There is no general theorem proving when complexity increases with time.

  • An overarching “principle of increasing complexity” or a “cosmic imperative” could be consistent with the existing laws of physics if formulated within the freedom afforded by quantum post-selection.