Thearle, OliverJanousek, JiriArmstrong, SeijiHosseini, SaraSchünemann, MelaineAssad, SyedSymul, ThomasJames, MatthewHuntington, ElanorRalph, Timothy CameronLam, Ping Koy2020-01-142020-01-140031-9007http://hdl.handle.net/1885/197230A Bell inequality is a fundamental test to rule out local hidden variable model descriptions of correlations between two physically separated systems. There have been a number of experiments in which a Bell inequality has been violated using discrete-variable systems. We demonstrate a violation of Bell’s inequality using continuous variable quadrature measurements. By creating a four-mode entangled state with homodyne detection, we recorded a clear violation with a Bell value of B=2.31±0.02. This opens new possibilities for using continuous variable states for device independent quantum protocols.This research is supported by the Australian Research Council (ARC) under the Centre of Excellence for Quantum Computation and Communication Technology (Project No. CE110001027).application/pdfen-AU© 2018 American Physical Society201810.1103/PhysRevLett.120.0404062019-11-25