Dodonov VV. Invariant Quantum States of Quadratic Hamiltonians.
Entropy (Basel) 2021;
23:634. [PMID:
34069501 DOI:
10.3390/e23050634]
[Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 11/22/2022]
Abstract
The problem of finding covariance matrices that remain constant in time for arbitrary multi-dimensional quadratic Hamiltonians (including those with time-dependent coefficients) is considered. General solutions are obtained.
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