Tests of Bell inequality with arbitrarily low photodetection efficiency   and homodyne measurements
  We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings promote the hybrid measurement scenario as a candidate for loophole-free Bell tests beyond previous expectations. 
Mateus Ara\'ujo, Marco T\'ulio Quintino, Daniel Cavalcanti, Marcelo   Fran\c{c}a Santos, Ad\'an Cabello, Marcelo Terra Cunha
quant-ph