[Seminar] "Spacetime Foam and the Cosmological Constant" by Prof. Steven Carlip
Quantum Gravity Unit (Neiman Unit) would like to invite you to a seminar by Prof. Steven Carlip from University of California, Davis
Title: "Spacetime Foam and the Cosmological Constant"
Sixty-five years ago, John Wheeler suggested that Planck-scale quantum fluctuations of geometry and topology -- “spacetime foam” – might be important in understanding the cosmological constant. Twenty years later, Stephen Hawking initiated an exploration of this proposal by exploiting Euclidean path integral techniques. Here, I report on further progress, based on a canonical approach to quantum gravity and recent advances in the initial value formalism, that suggests that spacetime foam may indeed be capable of “hiding” a large cosmological constant.