期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 40, 期 43, 页码 13063-13073出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/40/43/014
关键词
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Matrix quasi-exactly solvable operators are considered and new conditions are determined to test whether a matrix differential operator possesses one or several finite-dimensional invariant vector spaces. New examples of (2 x 2)-matrix quasi-exactly solvable operators are constructed with the emphasis set on PT-symmetric Hamiltonians.
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