Acoustic analogue for quantum field theory with a source term.

We propose a nonrelativistic fluid analogue model for a scalar field coupled to a classical source. The generic analogue gravity model involves the phonon-field which is coupled to the acoustic metric. We work in the special relativity limit of the acoustic analogue. By assuming a time-dependent external potential on the fluid system, we are able to model a source term for the scalar field. Upon quantization, phonon creation due to the source is studied. [ABSTRACT FROM AUTHOR]