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• W3082217963 abstract "We show that domain walls, or kinks, can be constructed in simple scalar theories where the scalar has no potential. These theories belong to a class of k-essence where the Lagrangian vanishes identically when one lets the derivatives of the scalar vanish. The domain walls we construct have positive energy and stable quadratic perturbations. As particular cases, we find families of theories with domain walls and their quadratic perturbations identical to the ones of the canonical Mexican hat or sine-Gordon scalar theories. We show that canonical and non canonical cases are nevertheless distinguishable via higher order perturbations or a careful examination of the energies. In particular, in contrast to the usual case, our walls are local minima of the energy among the field configuration having some fixed topological charge, but not global minima." @default.
• W3082217963 created "2020-09-08" @default.
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• W3082217963 date "2021-02-16" @default.
• W3082217963 modified "2023-10-16" @default.
• W3082217963 title "Domain walls without a potential" @default.
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• W3082217963 doi "https://doi.org/10.1103/physrevd.103.036010" @default.
• W3082217963 hasPublicationYear "2021" @default.
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