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On periodically driven AdS/CFT
A bstractWe use the AdS/CFT correspondence to study a thermally isolated conformal field theory in four dimensions which undergoes a repeated deformation by an external periodic time-dependent source…
Dark Matter from new Technicolor Theories
We investigate dark matter candidates emerging in recently proposed technicolor theories. We determine the relic density of the lightest, neutral, stable technibaryon having imposed weak thermal…
Fractional and semi-local non-Abelian Chern-Simons vortices
- S. B. Gudnason
- 4 May 2010
Non-Abelian Chern–Simons vortices with generic gauge groups
- S. B. Gudnason
- Physics, Mathematics
- 1 June 2009
Large-N CP N − 1 sigma model on a finite interval and the renormalized string energy
We continue the analysis started in a recent paper of the large-N two-dimensional CPN−1 sigma model, defined on a finite space interval L with Dirichlet (or Neumann) boundary conditions. Here we…
Electron irradiation-induced destruction of carbon nanotubes in electron microscopes.
Transmission electron microscopy study of individual carbon nanotube breakdown caused by Joule heating in air.
- K. Mølhave, S. B. Gudnason, A. T. Pedersen, C. Clausen, A. Horsewell, P. Bøggild
- Materials ScienceNano letters
- 6 July 2006
Repeated structural and electrical measurements on individual multiwalled carbon nanotubes, alternating between electrical measurements under ambient conditions and transmission electron microscopy, indicate that the studied nanot tubes behave as diffusive conductors with remarkably predictable electrical properties despite extensive structural damage.
Towards working technicolor: Effective theories and dark matter
A fifth force, of technicolor type, responsible for breaking the electroweak theory is an intriguing extension of the standard model. Recently new theories have been shown to feature walking dynamics…
Vibrational modes of Skyrmions
We study the vibrational modes of Skyrmions with baryon numbers one through eight in the standard Skyrme model. The vibrational modes are found in the harmonic approximation around the classical…