Time dependent quadratic Hamiltonians and

Time-dependent quadratic Hamiltonian and the Heisenberg uncertainty principle

Propagator of a time-dependent unbound quadratic Hamiltonian system

Quantum representation of a time-dependent quadratic Hamiltonian in a time-dependent phase space frame

Quadratic time dependent Hamiltonians and separation of variables

The System whose Hamiltonian is a Time-dependent Quadratic Form in x and p

Exact quantum theory of a time-dependent system with quadratic hamiltonian