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18 papers · 2 filters
Multi-field inflation from single-field models
Martin Bojowald, Suddhasattwa Brahma, Sean Crowe +2
Quantization implies independent degrees of freedom that do not appear in the classical theory, given by fluctuations, correlations, and higher moments of a state. A systematic der…
A Superspace Dirac Operator in NCG and the "factorization" of the Ordinary Dirac Operator
Dominik Ciurla, Leszek Hadasz, Thomas Williams
We review a procedure of factorizing the Minkowski space Dirac operator over a~suitable superspace, discuss its Euclidean space version and apply the worked out formalism in the ca…
Incompressible topological solitons
C. Adam, C. Naya, K. Oles +3
We discover a new class of topological solitons. These solitons can exist in a space of infinite volume like, e.g., , but they cannot be placed in any finite volume,…
General-relativistic spin system
Danilo Artigas, Jakub Bilski, Sean Crowe +2
The models of spin systems defined on Euclidean space provide powerful machinery for studying a broad range of condensed matter phenomena. While the non-relativistic effective desc…
Kink Moduli Spaces -- Collective Coordinates Reconsidered
N. S. Manton, K. Oleś, T. Romańczukiewicz +1
Moduli spaces - finite-dimensional, collective coordinate manifolds - for kinks and antikinks in theory and sine-Gordon theory are reconsidered. The field theory Lagrangian r…
Properties of dynamical fractal geometries in the model of Causal Dynamical Triangulations
J. Ambjorn, Z. Drogosz, A. Görlich +1
We investigate the geometry of a quantum universe with the topology of the four-torus. The study of non-contractible geodesic loops reveals that a typical quantum geometry consists…