Exact solution of a~model of three bound oscillators with Stark nonlinearity
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 13, Tome 224 (1995), pp. 122-128

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A model of three bound boson oscillators with Stark nonlinearity is introduced and solved by the quantum inverse scattering method. For the trilinear oscillator, the eigenvalue problem is reduced to the spectral problem for the second-order homogeneous differential equation. Bibliography: 11 titles.
@article{ZNSL_1995_224_a9,
     author = {N. M. Bogoliubov},
     title = {Exact solution of a~model of three bound oscillators with {Stark} nonlinearity},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {122--128},
     publisher = {mathdoc},
     volume = {224},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_224_a9/}
}
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N. M. Bogoliubov. Exact solution of a~model of three bound oscillators with Stark nonlinearity. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 13, Tome 224 (1995), pp. 122-128. http://geodesic.mathdoc.fr/item/ZNSL_1995_224_a9/