5 quotes
String theory seems to be incompatible with a world in which a cosmological constant has a positive sign, which is what the observations indicate.
Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)
Spacetime... turns out to be discrete, described by a structure called spin foam.
Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)
In quantum theory, distance is inverse to energy, because you need particles of very high energy to probe very short distances. The inverse of the Planck energy is the Planck length.
Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)
I was joined by Carlo Rovelli, and we were able to make a full-fledged quantum theory of gravity... This became loop quantum gravity.
Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)
While most people... were seeking to modify the principles of either relativity or quantum theory, we surprised ourselves (and many other people) by succeeding in putting them together without modifying their principles.
Loop Quantum Gravity," The New Humanists: Science at the Edge (2003)