Publications of Frank Hellmann

Bahr, B.; Dittrich, B.; Hellmann, F.; Kaminski, W.: Holonomy Spin Foam Models: Definition and Coarse Graining. Physical Review D 87 (4), 044048 (2013)

Banisch, R.; Hellmann, F.; Rätzel, D.: The Unruh-deWitt Detector and the Vacuum in the General Boundary formalism. Classical and quantum gravity 30 (23), 235026 (2013)

Bianchi, E.; Hellmann, F.: The Construction of Spin Foam Vertex Amplitudes. Symmetry, Integrability and Geometry: Methods and Applications (SIGMA) 9, 008 (2013)

Dittrich, B.; Hellmann, F.; Kaminski, W.: Holonomy Spin Foam Models: Boundary Hilbert spaces and Time Evolution Operators. Classical and quantum gravity 30 (8), 085005 (2013)

Hellmann, F.; Kaminski, W.: Holonomy spin foam models: Asymptotic geometry of the partition function. Journal of high energy physics: JHEP 2013 (10), 165 (2013)

Barrett, J. W.; Hellmann, F.: Holonomy observables in Ponzano-Regge type state sum models. Classical and quantum gravity 29 (4), 045006 (2012)

Hellmann, F.: On the Expansions in Spin Foam Cosmology. Physical Review D 84, 103516 (2011)

Hellmann, F.; Kaminski, W.: Geometric asymptotics for spin foam lattice gauge gravity on arbitrary triangulations. (2012)