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hep-th1994
Variational Formulation of Linear Time-Dependent Invariants
O. Castaños, R. López-Peña, V. I. Man'ko
It is shown that linear time-dependent invariants for arbitrary multi\-dimensional quadratic systems can be obtained from the Lagrangian and Hamiltonian formulation procedures by c…
hep-th1994
Squeezing in a 2-D generalized oscillator
O. Castaños, R. López-Peña, V. I. Man'ko
A two-dimensional generalized oscillator with time-dependent parameters is considered to study the two-mode squeezing phenomena. Specific choices of the parameters are used to dete…