Amplifying the Hawking signal in BECs
  We consider simple models of Bose-Einstein condensates to study analog pair-creation effects, namely the Hawking effect from acoustic black holes and the dynamical Casimir effect in rapidly time-dependent backgrounds. We also focus on a proposal by Cornell to amplify the Hawking signal in density-density correlators by reducing the atoms' interactions shortly before measurements are made. 
Roberto Balbinot and Alessandro Fabbri
gr-qc cond-mat.quant-gas hep-th