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We use the language of squeezed states to give a systematic description oftwo issues in cosmological particle creation: a) Dependence of particlecreation on the initial state specified. We consider in particular the numberstate, the coherent and the squeezed state. b) The relation of spontaneous andstimulated particle creation and their dependence on the initial state. We alsopresent results for the fluctuations in particle number in anticipation of itsrelevance to defining noise in quantum fields and the vacuum susceptibility ofspacetime.Comment: 19 pages in latex. To appear in IJMP

SQUEEZED VACUA AND THE QUANTUM STATISTICS OF COSMOLOGICAL PARTICLE CREATION