Detecting squeezed boson fields via particle scattering

In condensed matter there are many boson fields which, like light, can be driven into a squeezed state through anharmonic interactions with an intense pump. Here a single-particle scattering technique is described by which such states can be detected. In particular it is shown that a coherence can be established between a scattering process which involves the emission of a boson and that which involves the absorption of a boson. When this coherence gives rise to destructive interference the scattering rate can be greatly inhibited below that when the boson field is in its vacuum state.