2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185995In a recent paper [Nieto M M 1996 Quantum and Semiclassical Optics, 8 1061; quant-ph/9605032], the one dimensional squeezed and harmonic oscillator time-displacement operators were reordered in coordinate-momentum space. In this paper, we give a general approach for reordering multi-dimensional exponential quadratic operator(EQO) in coordinate-momentum space. An explicit computational formula is provided and applied to the single mode and double-mode EQO through the squeezed operator and the time displacement operator of the harmonic oscillator.To appear in J. Phys. A: Mathematics and GeneralQuantum PhysicsComputational PhysicsOpticstext