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Non-linear supersymmetry for non-Hermitian, non-diagonalizable Hamiltonians : I. General properties. / Andrianov, A. A.; Cannata, F.; Sokolov, A. V.
в: Nuclear Physics B, Том 773, № 3, 02.07.2007, стр. 107-136.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Non-linear supersymmetry for non-Hermitian, non-diagonalizable Hamiltonians
T2 - I. General properties
AU - Andrianov, A. A.
AU - Cannata, F.
AU - Sokolov, A. V.
PY - 2007/7/2
Y1 - 2007/7/2
N2 - We study complex potentials and related non-diagonalizable Hamiltonians with special emphasis on formal definitions of associated functions and Jordan cells. The non-linear SUSY for complex potentials is considered and the theorems characterizing its structure are presented. We define the class of complex potentials invariant under SUSY transformations for (non-)diagonalizable Hamiltonians and formulate several results concerning the properties of associated functions. We comment on the applicability of these results for softly non-Hermitian PT-symmetric Hamiltonians. The role of SUSY (Darboux) transformations in increasing/decreasing of Jordan cells in SUSY partner Hamiltonians is thoroughly analyzed and summarized in the Index Theorem. The properties of non-diagonalizable Hamiltonians as well as the Index Theorem are illustrated in the solvable examples of non-Hermitian reflectionless Hamiltonians. The rigorous proofs are relegated to part II of this paper. At last, some peculiarities in resolution of identity for discrete and continuous spectra with a zero-energy bound state at threshold are discussed.
AB - We study complex potentials and related non-diagonalizable Hamiltonians with special emphasis on formal definitions of associated functions and Jordan cells. The non-linear SUSY for complex potentials is considered and the theorems characterizing its structure are presented. We define the class of complex potentials invariant under SUSY transformations for (non-)diagonalizable Hamiltonians and formulate several results concerning the properties of associated functions. We comment on the applicability of these results for softly non-Hermitian PT-symmetric Hamiltonians. The role of SUSY (Darboux) transformations in increasing/decreasing of Jordan cells in SUSY partner Hamiltonians is thoroughly analyzed and summarized in the Index Theorem. The properties of non-diagonalizable Hamiltonians as well as the Index Theorem are illustrated in the solvable examples of non-Hermitian reflectionless Hamiltonians. The rigorous proofs are relegated to part II of this paper. At last, some peculiarities in resolution of identity for discrete and continuous spectra with a zero-energy bound state at threshold are discussed.
UR - http://www.scopus.com/inward/record.url?scp=34248594954&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysb.2007.03.016
DO - 10.1016/j.nuclphysb.2007.03.016
M3 - Article
AN - SCOPUS:34248594954
VL - 773
SP - 107
EP - 136
JO - Nuclear Physics B
JF - Nuclear Physics B
SN - 0550-3213
IS - 3
ER -
ID: 36468994