Soliton Interaction with Slowly Varying Potentials
Mathematics Department, University of California, Evans Hall, Berkeley, CA 94720, USA
Correspondence: Correspondence to be sent to: holmer{at}math.berkeley.edu
We study the Gross–Pitaevskii equation with a slowly varying smooth potential,
. We show that up to time
and errors of size
in
, the solution is a soliton, evolving according to the classical dynamics of a natural effective Hamiltonian,
. This provides an improvement (
) compared to previous works, and is strikingly confirmed by numerical simulations.
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