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Title: Kink-Kink and Kink-Antikink Interactions with Long-Range Tails

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [3];  [4];  [5]; ORCiD logo [6]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Univ. of Hartford, West Hartford, CT (United States)
  3. National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Institute), Moscow (Russia); National Research Center Kurchatov Institute, Moscow (Russia)
  4. Univ. of Massachusetts, Amherst, MA (United States)
  5. Savitribai Phule Pune Univ., Pune (India)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this Letter, we address the long-range interaction between kinks and antikinks, as well as kinks and kinks, in φ2n+4 field theories for n > 1. The kink-antikink interaction is generically attractive, while the kink-kink interaction is generically repulsive. We find that the force of interaction decays with the 2n/(n–1)th power of their separation, and we identify the general prefactor for arbitrary n. Importantly, we test the resulting mathematical prediction with detailed numerical simulations of the dynamic field equation, and obtain good agreement between theory and numerics for the cases of n = 2 (φ8 model), n = 3 (φ10 model), and n = 4 (φ12 model).

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001; 02.a03.21.0005
OSTI ID:
1510543
Alternate ID(s):
OSTI ID: 1532709
Report Number(s):
LA-UR-18-30946; PRLTAO
Journal Information:
Physical Review Letters, Vol. 122, Issue 17; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Solvable self-dual impurity models journal July 2019
Family of potentials with power law kink tails journal August 2019
Multi-kink scattering in the double sine-Gordon model journal July 2019
Solvable self-dual impurity models text January 2019

Figures / Tables (5)