# Contents

## Idea

In quantum field theory a correlator is an assignment of probability amplitudes to a collection of incoming and outgoing states. In FQFT a correlator is simply the value of the theory on a given (class of) cobordisms.

holographic principle in quantum field theory

bulk field theoryboundary field theory
dimension $n+1$dimension $n$
fieldsource
wave functioncorrelation function
space of quantum statesconformal blocks

Revised on September 12, 2013 23:31:48 by Urs Schreiber (145.116.131.249)