[>] “we think it likely that the discovery of invisible matter”: Faber and Gallagher (1979).
“I didn’t take it at all seriously”: J. Peebles, private communication, 2011.
[>] “There was a lot of net casting in the eighties”: J. Peebles in Smeenk (2002).
[>] Y. Zel’dovich’s estimate of the cosmological constant: Zel’dovich (1968).
“We argue here that the successes”: Efstathiou, Sutherland, and Maddox (1990).
[>] “a universe having critical energy density”: Ostriker and Steinhardt (1995).
“The problem with the choice”: Peebles (1984).
“A non-zero cosmological constant”: Efstathiou, Sutherland, and Maddox (1990).
“requires a seemingly implausible”: Blumenthal, Dekel, and Primack (1988).
“How can we explain the non-zero”: Ostriker and Steinhardt (1995).
[>] “If you’re religious, this is like looking at God”: G. Smoot press conference at Lawrence Berkeley Laboratory, 1992.
[>] “The findings also appear to breathe”: Washington Post, January 9, 1998.
“Exploding Stars Point to a”: Glanz (1998).
“stunned the universe may be accelerating”: CNN, February 27, 1998.
“My own reaction is somewhere between amazement and horror”: B. Schmidt in the New York Times, March 3, 1998.
[>] “The best explanation for what the data”: J. Peebles, private communication, 2011.
[>] “After a genie is let out of the bottle”: Zel’dovich and Novikov (1971), p. 29.
dark energy: The term dark energy was first proposed in Huterer and Turner (1998).
12. THE END OF SPACETIME
The modern history of quantum gravity is fraught and fascinating. To get a grand overview, Rovelli (2010) has an appendix with the various major stages, discoveries, and shifts. DeWitt-Morette (2011) describes the genesis of the “Trilogy” and how DeWitt viewed the development of the field. For a hugely successful and articulate summary of string theory, you need to turn to Greene (2000). Yau and Nadis (2010) takes a mathematician’s viewpoint of string theory. The alternative paths to quantum gravity, such as loop quantum gravity, are well described in Smolin (2000). The two books that led to the vicious backlash against string theory are Smolin (2006) and Woit (2007). It is worth looking at some of the blogs and following the discussions to see how heated they became. I would look at the following and wind back to when the books were published:
http://blogs.discovermagazine.com/cosmicvariance/
http://asymptotia.com/
http://www.math.columbia.edu/~woit/wordpress/
The black hole information paradox is an ongoing story, and even though I haven’t discussed “black hole complementarity,” I highly recommend Susskind (2008) for a personal and energetic account of how the paradox has developed over the years. Solutions are still cropping up: as I was finishing this book, another proposal, “the firewall,” which modifies one of the fundamental tenets of general relativity, was being heatedly debated. For a description of the proposal, see http://blogs.scientificamerican.com/critical-opalescence/2012/12/14/when-you-fall-into-a-black-hole-how-long-have-you-got/.
[>] “Is the End in Sight for Theoretical Physics?”: S. Hawking’s lecture is published in its entirety in Boslough (1989).
[>] Hawking’s lecture: A colorful description of Hawking’s talk can be found in Susskind (2008).
[>] “Trilogy”: DeWitt-Morette (2011).
“Wheeler got tremendously excited”: Ibid.
[>] “a sort of patron of string theory . . . a conservationist . . . I set up a nature reserve”: Interview with M. Gell-Mann in Science News, September 15, 2009.
[>] “M stands for Magic”: E. Witten in interview with Swedish public radio, June 6, 2008.
[>] “I think all this superstring stuff is crazy . . . I don’t like that they’re”: R. Feynman in Davies and Brown (1988), p. 194.
“superstring physicists have not yet shown”: S. Glashow in Davies and Brown (1988).
“The long-standing crisis of string theory”: Friedan (2002).
[>] “In viewing string theory”: DeWitt-Morette (2011).
“should be confined to the dustbins of history . . . violates the very spirit of relativity”: Ibid.
“the Wheeler-DeWitt equation is wrong”: Ibid.
“elegant . . . apart from some”: Ibid.
“We have made tremendous progress with string and M-theory”: M. Duff, private communication, 2011.
“M-theory is the only candidate”: Hawking and Mlodinow (2010), p. 181.
[>] “quantum gravity . . . loop quantum gravity”: M. Duff, private communication, 2011.
“They can’t even calculate what a graviton does”: P. Candelas, private communication, 2011.
“A lot of people are frustrated that this community”: L. Smolin in Wired, September 14, 2006.
annual string theory meeting: In 2008, at the annual jamboree for string theory—Strings 2008 held at CERN—Rovelli was finally invited to make the case for loop quantum gravity.
[>] “It’s a deal breaker”: Episode 2, Series 2, of The Big Bang Theory, Chuck Lorre Productions/CBS.
[>] “approximate, emergent, classical concept”: Witten (1996a).
“geometry in the small”: Wheeler (1955).
13. A SPECTACULAR EXTRAPOLATION
Not a lot has been written on modified theories of gravity that I can recommend. Barrow and Tipler (1988) and Barrow (2003) do an excellent job of discussing the large number problem that intrigued Dirac, which is also discussed in Farmelo (2010). Sakharov’s scientific interests are cursorily discussed in Lourie (2002) and his own autobiography, Sakharov (1992). I recommend you take a peek at his collected works in Sakharov (1982) to see how concise he was. For the history of Milgrom and Bekenstein’s theory, it is probably best to read one of Bekenstein’s reviews; for example, Bekenstein (2007) is quite technical but will give you a flavor of what is going on. Peebles (2004) is a statesmanlike review of why looking beyond general relativity might be a good thing, and a more lay account can be found in Ferreira (2010).
[>] “The beauty of the equations provided by nature”: P. Dirac, interviewed on Canadian radio, 1979.
“Experimentalists, especially those at NASA . . . as time went by”: Brans (2008).
[>] “a man of universal interests”: A. Sakharov on Y. Zel’dovich in Sakharov (1988).
“I don’t understand how Sakharov thinks”: Y. Zel’dovich on A. Sakharov, http://www.joshuarubenstein.com/KGB/KGB.html.
[>] “People like Hawking are devoted to science”: Y. Zel’dovich on A. Sakharov in Sunyaev (2005).
“I felt compelled to speak out”: Sakharov (1992).
[>] “The elegant logic of general relativity . . . a spectacular extrapolation”: Peebles (2000).
[>] “At some point, I felt”: J. Bekenstein, private communication, 2011.
“Some looked at me as if I told them”: Ibid.
[>] “a dirty word”: N. Turok, private communication, 2005.
“By no means have we ruled out MOND”: J. Peebles in Smeenk (2002).
“One has to take into account”: J. Bekenstein, private communication, 2011.
“I decided that it was time”: Ibid.
Bekenstein’s theory: Bekenstein (2004).
14. SOMETHING IS GOING TO HAPPEN
If you want to come to grips with the multiverse, you might want to try two of its most eloquent advocates, such as Susskind (2006) and Greene (2012), but temper them with the contrasting view of Ellis (2011b). If you want to follow the big experiments, you should check out websites such as the following:
http://www.skatelescope.org/
http://www.eventhorizontelescope.org/
http://www.ligo.caltech.edu/
These are full of interesting facts about what is actually going on at the coal face of observational research in general relativity.
[>] textbooks: The two classic textbooks I d
escribe are Misner, Thorne, and Wheeler (1973) and Weinberg (1972).
[>] Event Horizon Telescope: A description of the Event Horizon Telescope can be found at http://www.eventhorizontelescope.org/.
[>] “Black Hole Confirmed in Milky Way”: http://news.bbc.co.uk/2/hi/science/nature/7774287.stm.
“Evidence Points to Black Hole”: New York Times, September 6, 2001.
recent observation of a quasar: M. Capellari is asked about the biggest black hole discovered to date at http://www.bbc.co.uk/news/science-environment-16034045.
[>] black holes at the LHC: An entertaining example of a response against black holes in the LHC can be found at http://www.lhcdefense.org/press.php.
“That is like asking what is north of the North Pole”: Jocelyn Bell Burnell, private communication, 2011.
[>] “I do not believe the existence”: Ellis (2011b).
“The multiverse argument is a well-founded”: Ellis (2011a).
“I hope the current”: E. Witten in Battersby (2005).
Bibliography
BOOKS
Barrow, J., The Constants of Nature, Vintage (2003).
Barrow, J., P. Davies, and C. Harper Jr., Science and Ultimate Reality: Quantum Theory, Cosmology and Complexity, Cambridge University Press (2004).
Barrow, J., and F. Tipler, The Anthropic Cosmological Principle, Oxford University Press (1988).
Baum, R., and W. Sheehan, In Search of the Planet Vulcan: The Ghost in Newton’s Clockwork Universe, Basic Books (1997).
Berendzen, R., R. Hart, and D. Seeley, Man Discovers the Galaxies, Science History Publications (1976).
Berger, A., The Big Bang and Georges Lemaître, D. Reidel (1984).
Bernstein, J., Oppenheimer: Portrait of an Enigma, Ivan R. Dee (2004).
Bernstein, J., and G. Feinberg, Cosmological Constants: Papers in Modern Cosmology, Columbia University Press (1986).
Bird, K., and M. Sherwin, American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer, Atlantic (2009).
Bodanis, D., E=mc 2: A Biography of the World’s Most Famous Equation, Pan (2001).
———, Electric Universe: How Electricity Switched On the Modern World, Abacus (2006).
Bondi, H., Cosmology, Cambridge University Press (1960).
Boslough, J., Stephen Hawking’s Universe, Avon (1989).
Burbidge, G., and M. Burbidge, Quasi-Stellar Objects, W. H. Freeman (1967).
Chandrasekhar, S., Eddington: The Most Distinguished Astrophysicist of His Time, Cambridge University Press (1983).
Christensen, S., ed., Quantum Theory of Gravity: Essays in Honor of the 60th Birthday of Bryce S. DeWitt, Adam Hilger (1984).
Close, F., The Infinity Puzzle, Oxford University Press (2011).
Collins, H., Gravity’s Shadow: The Search for Gravitational Waves, University of Chicago Press (2004).
Cook, N., The Hunt for Zero Point, Arrow (2001).
Cornwell, J., Hitler’s Scientists: Science, War, and the Devil’s Pact, Penguin (2004).
Danielson, D., The Book of the Cosmos: Imagining the Universe From Heraclitus to Hawking, Perseus (2000).
Davies, P., and J. Brown, eds., Superstrings, Cambridge University Press (1988).
DeWitt, C., and B. DeWitt, eds., Relativity Groups and Topology, Gordon and Breach Science Publishers (1964).
———, eds., Black Holes, Gordon and Breach Science Publishers (1973).
DeWitt, C., and D. Rickles, The Role of Gravitation in Physics: Report from the 1957 Chapel Hill Conference, Edition Open Access (2011).
DeWitt-Morette, C., Gravitational Radiation and Gravitational Collapse, D. Reidel (1974).
———, The Pursuit of Quantum Gravity: Memoirs of Bryce DeWitt From 1946 to 2004, Springer (2011).
Dickens, C., A Detective Police Party, Read Books (2011).
Doxiadis, A., and C. Papadimitriou, Logicomix: An Epic Search for Truth, Bloomsbury (2009).
Durham, F., and R. Purrington, Frame of the Universe: A History of Physical Cosmology, Columbia University Press (1983).
Eddington, A., The Nature of the Physical World, Cambridge University Press (1929).
———, Fundamental Theory, Cambridge University Press (1953).
———, The Internal Constitution of the Stars, Dover (1959).
———, The Mathematical Theory of Relativity, Cambridge University Press (1963).
Ehlers, J., J. Perry, and M. Walker, 9th Texas Symposium on Relativistic Astrophysics, New York Academy of Sciences (1980).
Einstein, A., Relativity, Routledge Classics (2001).
———, The Collected Papers of Albert Einstein, Volumes 1–13, Princeton University Press (2012).
Eisenstaedt, J., The Curious History of Relativity: How Einstein’s Theory of Gravity Was Lost and Found Again, Princeton University Press (2006).
Eisenstaedt, J., and A. Kox, eds., Studies in the History of General Relativity, Volume 3, Birkhauser (1992).
Ellis, G., A. Lanza, and J. Miller, The Renaissance of General Relativity and Cosmology, Cambridge University Press (1993).
Farmelo, G., The Strangest Man: The Life of Paul Dirac, Faber and Faber (2010).
Ferguson, K., Stephen Hawking: His Life and Work, Bantam (2012).
Ferreira, P., The State of the Universe: A Primer in Modern Cosmology, Phoenix (2007).
Feynman, R., Surely You’re Joking, Mr. Feynman! Adventures of a Curious Character, W. W. Norton (1985).
Feynman, R., F. Morinigo, and W. Wagner, Lectures on Gravitation, Penguin (1999).
Fölsing, A., Albert Einstein, Penguin (1998).
Gamow, G., My World Line: An Informal Autobiography, Viking (1970).
Gorobets, B., The Landau Circle: The Life of a Genius, URSS (2008).
Graham, L., Science in Russia and in the Soviet Union: A Short History, Cambridge University Press (1993).
Greene, B., The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory, Vintage (2000).
———, The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos, Penguin (2012).
Gregory, J., Fred Hoyle’s Universe, Oxford University Press (2005).
Gribbin, J., and M. Gribbin, How Far Is Up: The Men Who Measured the Universe, Icon Books (2003).
Harrison, B., K. Thorne, M. Wakano, and J. Wheeler, Gravitation Theory and Gravitational Collapse, University of Chicago Press (1965).
Harvey, A., On Einstein’s Path: Essays in Honor of Engelbert Schucking, Springer-Verlag (1992).
Hawking, S., A Brief History of Time: From the Big Bang to Black Holes, Bantam (1988).
Hawking, S., and W. Israel, eds., General Relativity: An Einstein Centenary Survey, Cambridge University Press (1979).
———, eds., Three Hundred Years of Gravitation, Cambridge University Press (1989).
Hawking, S., and L. Mlodinow, The Grand Design, Random House (2010).
Hoyle, F., The Nature of the Universe, Oxford Blackwell (1950).
———, Frontiers of Astronomy, Mentor (1955).
———, Home Is Where the Wind Blows: Chapters From a Cosmologist’s Life, University Science Books (1994).
Hoyle, F., G. Burbidge, and J. Narlikar, A Different Approach to Cosmology: From a Static Universe Through the Big Bang Towards Reality, Cambridge University Press (2000).
Isaacson, W., Einstein: His Life and Universe, Pocket Books (2008).
Isham, C., R. Penrose, and D. Sciama, eds., Quantum Gravity: An Oxford Symposium, Clarendon (1975).
John, L., Cosmology Now, BBC (1973).
Kaiser, D., “Making Theory: Producing Physics and Physicists in Postwar America,” unpublished PhD thesis, Harvard University (2000).
Kennefick, D., Traveling at the Speed of Thought: Einstein and the Quest for Gravitational Waves, Princeton University Press (2007).
Kilmister, C., Eddington’s Search for a Fundamental Theory: A Key to the Universe, Cambridge University Press (1994).
Kolb, E., M. Turner, K. Olive, and D. Sec
kel, Inner Space/Outer Space, University of Chicago Press (1986).
Kragh, H., Dirac: A Scientific Biography, Cambridge University Press (1990).
———, Cosmology and Controversy: The Historical Development of Two Theories of the Universe, Princeton University Press (1996).
Krauss, L., Quantum Man: Richard Feynman’s Life in Science, W. W. Norton (2012).
Kumar, M., Quantum: Einstein, Bohr, and the Great Debate About the Nature of Reality, Icon (2009).
Lambert, D., Un atome d’univers: La vie et l’oeuvre de Georges Lemaître, Éditions Racine (1999).
Lang, K., and O. Gingrich, A Source Book in Astronomy and Astrophysics, 1900–1975, Harvard University Press (1979).
Lemonick, M., The Light at the Edge of the Universe, Princeton University Press (1995).
Lenin, V., Materialism and Empiriocriticism, Literary Licensing, LLC (2011).
Levin, J., A Madman Dreams of Turing Machines, Phoenix (2010).
Lichnerowicz, A., A. Mercier, and M. Kervaire, Cinquantenaire de la théorie de la relativité, Birkhäuser (1956).
Lightman, A., and R. Brawer, Origins: The Lives and Worlds of Modern Cosmologists, Harvard University Press (1990).
Lourie, R., Sakharov: A Biography, Brandeis (2002).
Marx, K., Capital, Penguin (1990).
Melia, F., Cracking the Einstein Code: Relativity and the Birth of Black Hole Physics, University of Chicago Press (2009).
Michelmore, P., Einstein: Profile of the Man, Dodd, Mead (1962).
Miller, A., Empire of the Stars: Friendship, Obsession, and Betrayal in the Quest for Black Holes, Abacus (2007).
———, Deciphering the Cosmic Number: The Strange Friendship of Wolfgang Pauli and Carl Jung, W. W. Norton (2009).
Minton, S., Fred Hoyle: A Life in Science, Cambridge University Press (2011).
Misner, C., K. Thorne, and J. Wheeler, Gravitation, W. H. Freeman (1973).
Monk, R., Inside the Centre: The Life of J. Robert Oppenheimer, Jonathan Cape (2012).
Munns, D., A Single Sky: How an International Community Forged the Science of Radio Astronomy, MIT Press (2012).
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