Imagine there is no space and time in the background; no canvas to paint the dynamics of the physical universe on. Imagine a play in which the stage joins the troupe of actors. Imagine a novel in which the book itself is a character...
Yes, one can still do physics without sacrificing any mathematical precision. In classical physics, Einstein taught us how to do this by weaving the gravitational field into the very fabric of spacetime. In the resulting theory, general relativity, there is no background spacetime, no inert arena, no spectators in the cosmic dance. Matter, through its gravity, tells spacetime how to bend and curved spacetime, in turn, tells matter how to move. However, classical physics is incomplete; it ignores the quantum world. Can we fuse the pristine, geometric world of Einstein's with quantum physics, without robbing it of its soul? Can we realize Einstein's vision at the quantum level?
Find out!
Articles aimed at general public interested in fundamental issues of physics and spacetime structure:
 Space and Time: From Antiquity to Einstein and Beyond (PDF)
by Abhay Ashtekar
A semipopular article addressed to undergraduates.
From `Resonance', the outreach journal of the Indian Academy of
Science, (with an additional figure).
 Quantum Nature of the Big Bang in Loop Quantum Cosmology (PDF)
by Abhay Ashtekar
Invited contribution to the session on Singularities of the 23rd Solvay
Conference in Physics, held at Brussels in NovemberDecember 2005. A
slightly expanded version of the article to appear in the Proceedings.
 Quantum Geometry and its Applications (PDF File)
by Abhay Ashtekar and Jerzy Lewandowski
From Encyclopedia of Mathematical Physics (Elsevier)
 Black Hole Mechanics (PDF File)
by Abhay Ashtekar
From Encyclopedia of Mathematical Physics (Elsevier)
 Gravity and the Quantum (PDF file)
by Abhay Ashtekar
From the special issue 'spacetime Hundred Years Later',
edited by R. Price and J. Pullin, of the New Journal of Physics
 Space and Time: Einstein and Beyond
by Abhay Ashtekar
From the Penn State Science Journal, Vol 23 (2005).
This is the first in a new series of featured articles.
http://igpg.gravity.psu.edu/people/Ashtekar/articles/space&time.pdf
 Rückkehr aus dem Schwarzen Loch
(To the Black Hole and Back)
by Rüdiger Vaas
From the German publication Bild der Wissenschaft (June 2005)
http://igpg.gravity.psu.edu/people/Ashtekar/articles/Rueckkehr.pdf
 Der Herr Der Quanten (PDF file)
Abhay Ashtekar's profile
GEO, Special issue celebrating 100 years of relativity
 Gravity and the Quantum (PDF file)
by Abhay Ashtekar
From the special issue 'spacetime Hundred Years Later',
edited by R. Price and J. Pullin, of the New Journal of Physics, http://www.iop.org
 Der Umgestulpte Urknall
(The inverted BigBan)(PDF file)
by Rüdiger Vaas
From the German publication Bild der Wissenschaft (April 2004)
http://igpg.gravity.psu.edu/research/articles/derumg.pdf
 Das Duell: Strings Gegen Schleifen
(The Duel: Strings versus Loops)(PDF File)
by Rüdiger Vaas
From the German Publication Bild der Wissenschaft (April 2004)
http://igpg.gravity.psu.edu/research/articles/dasduell.pdf
 Jenseits von Raum und Zeit (PDF file)
(Beyond Space and Time) (PDF file)
by Rüdiger Vaas
From the German publication Bild der Wissenschaft (December 2003)
http://igpg.gravity.psu.edu/people/Ashtekar/articles/germanarticle.pdf
 Loop quantum gravity(PDF file)
by Carlo Rovelli
From Physics World (November 2003)
http://igpg.gravity.psu.edu/people/Ashtekar/articles/rovelli03.pdf
 Space and Time Beyond Einstein
by Abhay Ashtekar and Jerzy Lewandowski
From the Polish publication RZECZPOSPOLITA (April 2002)
http://www.rzeczpospolita.pl/gazeta/wydanie_020416/nauka/nauka_a_4.html
English Text Version
 Scientist at Work: Dr. Abhay Ashtekar
by James Glanz
New York Times, Sceince Section
http://igpg.gravity.psu.edu/~ashtekar/nyt/abhay.html
 Beyond Space and Time (PDF)
by Robert Matthews
New Scientist, No 2082 3842
 The Quest for Quantum Gravity (PDF)
by Gary Au
Current Science, vol 69, 499518
 Loops of Space (PDF)
by Marcia Bartusiak
Discover, vol 14, 6068
Article addressed to advanced undergraduates and graduate students
(summarizes the status of background independent, loop quantum
gravity as of June 2001):
