Abstract
In this chapter a review of recent advances related to the emerging field of integrable nonlocal nonlinear PT symmetric, reverse space-time and reverse time only equations is presented. Starting from the well-known AKNS theory, it is shown how to obtain a host of nonlocal integrable equations previously discovered by the authors. Included are the nonlocal PT symmetric (1 + 1)D nonlinear Schrödinger (NLS) equation and its multi-component generalization; the reverse space-time and reverse time only NLS equations along with their vector versions. The inverse scattering transform associated with the nonlocal NLS hierarchy is briefly summarized and one soliton solutions corresponding to each of the above case are presented. The discrete nonlocal PT symmetric, reverse space-time and reverse time only NLS equations are also discussed. Starting from the Ablowitz-Ladik scattering problem, it is shown that all these discrete models arise from simple symmetry reductions.
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Acknowledgements
MJA was partially supported by NSF under Grant No. DMS-1712793.
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Ablowitz, M.J., Musslimani, Z.H. (2018). Integrable Nonlocal PT Symmetric and Reverse Space-Time Nonlinear Schrödinger Equations. In: Christodoulides, D., Yang, J. (eds) Parity-time Symmetry and Its Applications. Springer Tracts in Modern Physics, vol 280. Springer, Singapore. https://doi.org/10.1007/978-981-13-1247-2_17
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