Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Romańczukiewicz, T."'
We show that the decay of strongly excited oscillons in a single vacuum model reveals a chaotic, fractal-like pattern very much like one found in kink-antikink collision in the $\phi^4$ model. This structure can be attributed to the resonant energy t
Externí odkaz:
http://arxiv.org/abs/2403.00443
We show that large scale oscillons, i.e., quasi-periodic, long living particle like solutions, may exist in massless theories, too. Their existence is explained using an effective (smeared) mass threshold which takes into account nonlinear (finite) p
Externí odkaz:
http://arxiv.org/abs/2312.05308
We find that an oscillon can possess a characteristic double oscillation structure even though it results in a decay of a sphaleron which does not have any positive energy vibrational mode. We show that dynamics of such an oscillon can still be captu
Externí odkaz:
http://arxiv.org/abs/2309.11167
Autor:
Alonso-Izquierdo, A., Navarro-Obregón, S., Oles, K., Queiruga, J., Romanczukiewicz, T., Wereszczynski, A.
We construct a simple field theory in which a sphaleron, i.e., a saddle-point particle-like solution, forms a semi-BPS state with a background defect that is an impurity. This means that there is no static force between the sphaleron and the impurity
Externí odkaz:
http://arxiv.org/abs/2308.14420
We analyze the perturbative Relativistic Moduli Space approach, where the amplitudes of the Derrick modes are promoted to collective coordinates. In particular, we analyse the possibility to calculate the critical velocity, i.e., the initial velocity
Externí odkaz:
http://arxiv.org/abs/2304.14076
Autor:
Manton, N. S., Romańczukiewicz, T.
Oscillons in a simple, 1-dimensional scalar field theory with a cubic potential are discussed. The theory has a classical sphaleron, whose decay generates a version of the oscillon. A good approximation to the small-amplitude oscillon is constructed
Externí odkaz:
http://arxiv.org/abs/2301.09660
Autor:
Adam, C., Martín-Caro, A. García, Huidobro, M., Oles, K., Romanczukiewicz, T., Wereszczynski, A.
We show that constrained $CP^1$ instantons, combined with the Relativistic Moduli Space approach, can accurately describe kink-antikink collisions in the $\phi^4$ model.
Comment: 8 pages, 5 figures
Comment: 8 pages, 5 figures
Externí odkaz:
http://arxiv.org/abs/2212.11936
We find that for various solitonic processes the corresponding canonical moduli space can have a boundary which is accessible in a finite time evolution. We show that such a boundary is not a failure of the moduli space approach but has a physical me
Externí odkaz:
http://arxiv.org/abs/2210.09068
We show that thick spectral walls exist in antikink-kink collisions in the $\phi^6$ model. In this model, they are triggered by the so-called $delocalized$ $modes$ which do not exist in the single-soliton sector but emerge in antikink-kink ($\bar{K}K
Externí odkaz:
http://arxiv.org/abs/2209.11479
Autor:
Adam, C., Dorey, P., Martin-Caro, A. Garcia, Huidobro, M., Oles, K., Romanczukiewicz, T., Shnir, Y., Wereszczynski, A.
Antikink-kink ( $\bar{\rm K} $$ {\rm K}$) collisions in the $\phi^6$ model exhibit resonant scattering although the $\phi^6$ kinks do not support any bound states to which energy could be transferred. In Phys. Rev. Lett. 107 (2011) 091602 it was conj
Externí odkaz:
http://arxiv.org/abs/2209.08849