Browsing University of Waterloo by Subject "Spin Foam"

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A 4d Lorentzian Spin Foam Model With Timelike Surfaces

Hnybida, Jeffrey (University of Waterloo, 2010-10-07)

We construct a 4d Lorentzian spin foam model capable of describing both spacelike and timelike surfaces. To do so we use a coherent state approach inspired by the Riemannian FK model. Using the coherent state method we ...
Amplitudes in the Spin Foam Approach to Quantum Gravity

Chen, Linqing (University of Waterloo, 2017-07-31)

In this thesis, we study a Spin Foam model for 4D Riemannian quantum gravity, and propose a new way of imposing the simplicity constraints that uses the recently developed holomorphic representation. Rather than imposing ...