The observable universe could be a 1 + 3-surface (the “brane”) embedded in a 1 + 3 + ddimensional spacetime...

Kaluza attempted to unify Einstein’s theory of gravity with Maxwell’s theory
of electromagnetism by adding a fifth dimension to...

Quantum Gravity is a dream, a theoretical need and a scientific goal. It is a theory
which still does...

A centenary after Einstein’s annus mirabilis it is timely to reconsider the foundations
of physical theories. Quantum mechanics, our...

Stringtheoryhasbeentheleadingcandidateforaunifiedquantumtheoryofall
interactionsduringthe last15years. Thedevelopementsof the lastfiveyears
haveopenedthepossibilitytogobeyondperturbationtheoryandtoaddress
themostinterestingproblemsofquantumgravity.Amongthemostprominent
1
of such problems are those related...

“In the beginning was the Word...”
“Consider sunbeams. When the sun’s rays let in
Pass through the...

This book attempts to give at a graduate level a self-contained, thorough and ped
agogic exposition of the...

In this latest edition new material has been added, which includes many
additional clarifying remarks to some of the...

This book is based on lectures given in quantum theory over the years at
various levels culminating into graduate...

This edition includes five new sections and a third appendix. Most other sections are expanded, in particular Sects. 5.2 and...