Theory Colloquium

Quantum Gravity - Important Challenge for Theoretical Physics

by Jerzy Lukierski

4-3-006 - TH Conference Room (CERN)

4-3-006 - TH Conference Room


Show room on map
After short historical introduction about the description of fundamental interactions I shall recall the nonrenormalizability of quantum gravity (QG) in perturbative QFT approach. It will be pointed out the difference between the notion of space-time fields in particle physics and in quantum gravity taking into consideration the dynamical nature of space-time. In particular it will be pointed out the appearance of noncommutative space-times as characteristic feature of QG at Planck distances. Further we shall consider briefly four main approaches to QG:
a) Loop quantum gravity,
b) QG as deformed field theory on noncommutative space-time,
c) Functional formulation of QG and lattice approach,
d) QG as a sector of quantized string field theory.
We argue that these approaches are rather complementary in formulating of QG model with desired properties (covariance under local diffeomorphisms, background space- time field independence, appearance of noncommutative space-times at ultrashort distances, finiteness of calculated QG effects, incorporation of QG into unified model of fundamental interactions).
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now