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Title: Multidimensional discrete compactons in nonlinear Schrödinger lattices with strong nonlinearity management

Journal Article · · Physical Review A - Atomic, Molecular, and Optical Physics
 [1];  [2];  [3];  [4]
  1. Amherst College, MA (United States)
  2. Univ. of Salerno (Italy)
  3. Univ. of Massachusetts, Amherst, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. International Islamic Univ. of Malaysia (Malaysia)

The existence of multidimensional lattice compactons in the discrete nonlinear Schrödinger equation in the presence of fast periodic time modulations of the nonlinearity is demonstrated. By averaging over the period of the fast modulations, an effective averaged dynamical equation arises with coupling constants involving Bessel functions of the first and zeroth kinds. We show that these terms allow one to solve, at this averaged level, for exact discrete compacton solution configurations in the corresponding stationary equation. We focus on seven types of compacton solutions. Single-site and vortex solutions are found to be always stable in the parametric regimes we examined. We also found that other solutions such as double-site in- and out-of-phase, four-site symmetric and antisymmetric, and a five-site compacton solution are found to have regions of stability and instability in two-dimensional parametric planes, involving variations of the strength of the coupling and of the nonlinearity. We also explore the time evolution of the solutions and compare the dynamics according to the averaged equations with those of the original dynamical system. Finally, the possible observation of compactons in Bose-Einstein condensates loaded in a deep two-dimensional optical lattice with interactions modulated periodically in time is also discussed.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NSF-DMS-1312856; BSF-2010239; FA9550-12-1-0332; AC52-06NA25396
OSTI ID:
1234821
Alternate ID(s):
OSTI ID: 1226505
Report Number(s):
LA-UR-15-26190; PLRAAN; TRN: US1600433
Journal Information:
Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 92, Issue 5; ISSN 1050-2947
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (2)

Kinks and branes in models with hyperbolic interactions journal September 2017
Kinks and branes in models with hyperbolic interactions text January 2017

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