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Nonlinear Schr\"odinger equation on the half-line without a conserved number of solitons

Abstract : We explore the phenomena of absorption/emission of solitons by an integrable boundary for the nonlinear Schr\"odinger equation on the half-line. This is based on the investigation of time-dependent reflection matrices which satisfy the boundary zero curvature equation. In particular, this leads to absorption/emission processes at the boundary that can take place for solitons and higher-order solitons. As a consequence, the usual charges on the half-line are no longer conserved but we show explicitly how to restore an infinite set of conserved quantities by taking the boundary into account. The Hamiltonian description and Poisson structure of the model are presented, which allows us to derive for the first time a classical version of the boundary algebra used originally in the context of the quantum nonlinear Schr\"odinger equation.
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Preprints, Working Papers, ...
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https://hal.archives-ouvertes.fr/hal-03773917
Contributor : Virginie Malaval Connect in order to contact the contributor
Submitted on : Friday, September 9, 2022 - 3:40:44 PM
Last modification on : Saturday, September 10, 2022 - 3:31:33 AM

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  • HAL Id : hal-03773917, version 1
  • ARXIV : 2206.13978

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Vincent Caudrelier, Nicolas Crampe, Eric Ragoucy, Cheng Zhang. Nonlinear Schr\"odinger equation on the half-line without a conserved number of solitons. 2022. ⟨hal-03773917⟩

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