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8 - Chemistry and sensitivity

Published online by Cambridge University Press:  18 December 2009

By
John D. Barrow
Edited by
John D. Barrow ,
Simon Conway Morris ,
Stephen J. Freeland  and
Charles L. Harper, Jr
John D. Barrow
Affiliation:
Professor of Mathematical Sciences in the Department of Applied Mathematics and Theoretical Physics, University of Cambridge; Director, Millennium Mathematics Project
John D. Barrow
Affiliation:
University of Cambridge
Simon Conway Morris
Affiliation:
University of Cambridge
Stephen J. Freeland
Affiliation:
University of Maryland, Baltimore
Charles L. Harper, Jr
Affiliation:
John Templeton Foundation
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Summary

Introduction

In recent years, there has been great interest among some particle physicists and astronomers in assessing the dependence of the gross structure of the universe on the values of its defining constants of nature. This agenda has been partly motivated by the recognition that many of the most important structures in the universe, and its most crucial evolutionary pathways over billions of years of cosmic history, are surprisingly sensitive to the values of some of those constants. Since we lack any fundamental understanding of why any of the constants of nature take the values that they do, this state of affairs appears surprisingly fortuitous. It provokes cosmologists to consider our observed universe in the context of a wider ensemble of possible universes in which the laws of nature remain the same but the constants of nature, or the boundary conditions that specify the overall expansion dynamics of the universe, are allowed to change. In effect, a type of “stability” analysis is performed to ascertain how large such changes in the structure of the universe and its defining constants could be and still give rise to a recognizable universe.

These considerations have attracted renewed attention with the realization that our universe may have a significant non-uniform structure in space, in which the values of many of the quantities that we dub “constants” may in fact be variable values of spacetime-dependent fields.

Type
Chapter
Information
Fitness of the Cosmos for Life
Biochemistry and Fine-Tuning
 , pp. 132 - 150
Publisher: Cambridge University Press
Print publication year: 2007

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References

L. Susskind. The anthropic landscape of string theory. hep-th/0302219.
Banks, T., Dine, M. and Gorbatov, E.. Is there a string theory landscape?Journal of High Energy Physics, 08, 058 (2004).CrossRefGoogle Scholar
Vilenkin, A.. Unambiguous probabilities in an eternally inflating universe. Physical Review Letters, 81, 5501 (1998); A. Linde. Quantum creation of an open inflationary universe. Physical Review, D58, 083514 (1998); J. Garriga, A. Linde and A. Vilenkin. Dark energy equation of state and anthropic selection. Physical Review, D69, 063521 (2004).CrossRefGoogle Scholar
Barrow, J. D.. The Constants of Nature. London and New York: Random House (2002).Google Scholar
Kreuzer, H. J., Gies, M., Malli, G. L.et al. Has a possible change of the values of the physical constants a role in biological evolution?Journal of Physics, A18, 1571 (1985).Google Scholar
J. D. Barrow and F. J. Tipler. The Anthropic Cosmological Principle. Oxford and New York: Oxford University Press (1986); see also Barrow, J. D.. The Artful Universe Expanded. Oxford and New York: Oxford University Press (2005).Google Scholar
Ward, P. and Brownlee, D.. Rare Earth. New York: Springer (1999).Google Scholar
Gonzalez, G. and Richards, J. W.. The Privileged Planet. Washington, D.C.Regnery (2004).Google Scholar
Henderson, L. J.. The Fitness of the Environment: An Inquiry into the Biological Significance of the Properties of Matter. New York: Macmillan (1913); repr. Boston, MA: Beacon Press (1958); Gloucester, MA: Peter Smith (1970).Google Scholar
Henderson, L. J.. The Order of Nature. Cambridge, MA: Harvard University Press (1917).CrossRefGoogle Scholar
Prout, W.. Chemistry, Meteorology, and the Function of Digestion, Considered with Reference to Natural Theology. Bridgewater Treatise VIII. London: The Royal Society (1834); 4 edns. by 1855.Google Scholar
J. Cooke. Religion and Chemistry. New York: Scriven (1880). This work is discussed further, as is Darwin's theory of evolution by natural selection, by Valentine, M. in Natural Theology; or, Rational Theism. Chicago: S. C. Griggs (1885). Cooke's book is quite rare but can be read online at http://etext.lib.virginia.edu/toc/modeng/public/CooReli.html.Google Scholar
Chadbourne, P. A.. Lectures on Natural Theology. New York: Putnam (1870).Google Scholar
Wallace, A. R.. Man's Place in the Universe. London: Chapman and Hall (1903).Google Scholar
Needham, J.. Order and Life. New Haven, CT: Yale University Press (1936).Google Scholar
Haldane, J. S.. Nature, 100, 262 (1917).Google Scholar
Haldane, J. B. S.. Physical science and philosophy (contribution to debate). Nature, 139, 1002 (1937); Radioactivity and the origin of life in Milne's cosmology. Nature, 158, 555 (1944). See also Haldane's article (The origins of life) in the volumeNew Biology 16, ed. Johnson, M. L., Abercrombie, M. and Fogg, G. E.. London: Penguin (1955), p. 23.Google Scholar
Whewell, W.. Astronomy and General Physics, Considered with Reference to Natural Theology. Bridgewater Treatise III. London: The Royal Society (1833); 9 edns. by 1864.Google Scholar
D. Hume. Dialogues Concerning Natural Religion, ed. Kemp, N. Smith. Indiana: Bobbs Merrill (1977); first published in 1779, probably in Edinburgh.Google Scholar
I. Kant. Critique of Pure Reason, ed. Kemp, N. Smith. London: Macmillan (1968); first published in 1781.Google Scholar
Smith, G., ed. Josiah Royce's Seminar, 1913–1914: As Recorded in the Notebooks of Harry T. Costello. New Brunswick, NJ: Rutgers University Press (1963).Google Scholar
Parascandola, J.. Organismic and holistic concepts in the thought of L. J. Henderson. Journal of the History of Biology, 4, 64 (1971).CrossRefGoogle ScholarPubMed
W. Paley. Natural Theology (1802). In The Works of William Paley, ed. Lynam, R.. Edinburgh: Baynes and Son (1825).Google Scholar
Bentley, R.. A Confutation of Atheism from the Origin and Frame of the World. London: Phoenix (1693).Google Scholar
Newton's letters to Bentley can be found in Cohen, I. B.. Isaac Newton's Papers and Letters on Natural Philosophy and Related Documents. Cambridge, MA: Harvard University Press (1958).Google Scholar
Dicke, R. H.. Principle of equivalence and weak interactions. Reviews of Modern Physics, 29, 375 (1957); also, Dirac's cosmology and Mach's principle. Nature, 192, 440 (1961).Google Scholar
Dirac, P. A. M.. The cosmological constants. Nature, 139, 323 (1937).CrossRefGoogle Scholar
Rees, M. J.. Before the Beginning: Our Universe and Others. New York: Simon and Schuster (1997).Google Scholar
Tegmark, M.. Is the “Theory of Everything” merely the Ultimate Ensemble Theory?Annals of Physics (NY), 270, 1 (1998).CrossRefGoogle Scholar
Smolin, L.. Three Roads to Quantum Gravity. London: Weidenfeld (2000).Google Scholar
For a range of views on the interpretations of quantum theory, see articles in Barrow, J. D., Davies, P. C. W. and Harper, C. L. Jr., eds. Science and Ultimate Reality: Quantum Theory, Cosmology and Complexity. Cambridge, UK: Cambridge University Press (2004).CrossRefGoogle Scholar
Barrow, J. D.. Time-varying G. Monthly Notices of the Royal Astronomical Society, 282, 1397 (1996).CrossRefGoogle Scholar
Murphy, M., , J.Webb, , Flambaum, V.et al. Possible evidence for a variable fine structure constant from QSO absorption lines – I. Motivations, analysis and results. Monthly Notices of the Royal Astronomical Society, 327, 1208 (2001).CrossRefGoogle Scholar
Webb, J. K., Flambaum, V. V., Churchill, C. W.et al. Evidence for time variation of the fine structure constant?Physical Review Letters, 82, 884 (1999); J. K. Webb, M. T. Murphy, V. V. Flambaum et al. Further evidence for cosmological evolution of the fine structure constant. Physical Review Letters, 87, 091301 (2001).CrossRefGoogle Scholar
B. Carter. Large number coincidences and the anthropic principle in cosmology. In Confrontation of Cosmological Theories with Observational Data, International Astronomical Union Symposium No. 63, ed. Longair, M. S.. Dordrecht: Reidel (1974), pp. 291–8; also The anthropic principle and its implications for biological evolution. Philosophical Transactions of the Royal Society of London, A310, 347 (1983).CrossRefGoogle Scholar
Carr, B. J. and Rees, M.. The anthropic principle and the structure of the physical world. Nature, 278, 611 (1979).CrossRefGoogle Scholar
Davies, P. C. W.. The Accidental Universe. Cambridge, UK: Cambridge University Press (1982).Google Scholar
Hogan, C. J.. Why the universe is just so. Reviews of Modern Physics, 72, 1149 (2000).CrossRefGoogle Scholar
Ellis, J. and Nanopoulos, D. V.. A refined estimate of the fine structure constant. Nature, 292, 436 (1981).CrossRefGoogle Scholar
Hoyle, F., Dunbar, D. N. F., Wenzel, W.et al. The 7.68 MeV state in C12. Physical Review, 92, 1095 (1953).Google Scholar
Oberhummer, H., Csoto, A. and Schlattl, H.. Fine tuning the basic forces of nature through the triple alpha process in red giant stars. Science, 289, 88 (2000).CrossRefGoogle Scholar
Lieb, E.. The stability of matter. Reviews of Modern Physics, 48, 553 (1976); J. Fröhlich, E. Lieb and M. Loss. Stability of Coulomb systems with magnetic fields. Communications in Mathematical Physics, 104, 251 (1986); E. H. Lieb, M. Loss and J. P. Solovej. Stability of matter in magnetic fields. Physical Review Letters, 75, 985 (1995).CrossRefGoogle Scholar
Chand, H., Srianand, R., Petitjean, P.et al. Probing the cosmological variation of the fine structure constant: results based on VLT-UVES sample. Astronomy and Astrophysics, 417, 853 (2004).CrossRefGoogle Scholar
Steinhardt, C.. Constraints on field theoretical models for variation of the fine structure constant. Physical Review, D71, 043509 (2005).Google Scholar
May, R.. Will a large complex system be stable?Nature, 238, 213 (1972); S. L. Pimm. The complexity and stability of ecosystems, Nature, 307, 321 (1984).CrossRefGoogle Scholar
King, A. W. and Pimm, S. L.. Complexity, diversity, and stability: a reconciliation of theoretical and empirical results. American Naturalist, 122, 145 (1983).CrossRefGoogle Scholar
P. Erdös and A. Rényi. On random graphs. Publicationes Mathematicae, Debrecen (Hungary), 6, 290 (1959); for a discussion see Alon, N. and Spencer, J. H.. The Probabilistic Method. New York: Wiley (1992).Google Scholar
Conway, S. Morris. Life's Solution: Inevitable Humans in a Lonely Universe. Cambridge, UK: Cambridge University Press (2003).CrossRefGoogle Scholar
Bak, P.. How Nature Works. Oxford: Oxford University Press (1997).Google Scholar
Chaplin, M.. Water Structure and Behavior. Available online at www.lsbu.ac.uk/water/data.html.
M. T. Murphy, J. K. Webb and V. F. Flambaum. Revision of VLT/UVES constraints on a varying fine-structure constant. astro-ph/0612407.

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