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Self-dual hopfions
(Springer, 2010-03-01)
We construct static and time-dependent exact soliton solutions with nontrivial Hopf topological charge for a field theory in 3 + 1 dimensions with the target space being the two dimensional sphere S(2). The model considered ...
The S-matrix bootstrap IV: multiple amplitudes
(2019-11-01)
We explore the space of consistent three-particle couplings in ℤ2-symmetric two-dimensional QFTs using two first-principles approaches. Our first approach relies solely on unitarity, analyticity and crossing symmetry of ...
Soluções clássicas na teoria quântica de campos e suas implicações
(Universidade Federal de Minas GeraisBrasilICX - DEPARTAMENTO DE FÍSICAPrograma de Pós-Graduação em FísicaUFMG, 2022-03-10)
In this Masters dissertation, topological solitons will be investigated in the classical theory of fields, more specifically, kinks, vortices, monopoles and instantons. These objects emerge in the theory after a symmetry ...
Long-range spin chirality dimer order in the Heisenberg chain with modulated Dzyaloshinskii-Moriya interactions
(American Physical Society, 2019-05-31)
The ground-state phase diagram of a spin S = 1 2 XXZ Heisenberg chain with spatially modulated Dzyaloshinskii-Moriya interaction H= n{J(Sx nSx n+1 +Sy nSy n+1 )+JzSz nSz n+1 +[D0 +(−1)nD1](Sx nSy n+1 −S y nSx n+1 )}is ...
Aspects of antiferromagnetic spintronics
(Universidad de Chile, 2016)
La spintrónica se perfila como una de las corrientes mas atractivas y prometedoras dentro de la materia condensada gracias a la diversidad de fenómenos presentes, como el efecto Hall de spin, la magneto-resistencia gigante. ...
Integrable deformations of strings on symmetric spaces
(Springer, 2015)