Is work on solitons in QFT's focused on finding solutions that could represent the fundamental particles of the Standard Model, or is the work focused on finding particles Beyond The Standard Model? If the work is primarily BTSM, is it still possible that solitons represent the SM particles?
My related question is: is there any possible relationship between solitions in N-dimensional QFT's, and string theory? Is there a possible duality in which strings are just solitions in a QFT? Or is that just silly and impossible?