Bell-Inequality Violation with a Triggered Photon-Pair Source
Robert James Young, R. M. Stevenson, Andrew J. Hudson, Christine A. Nicoll, D. A. Ritchie, Andrew J. Shields · Physical Review Letters · 2009
Here we demonstrate, for the first time, violation of Bell's inequality using a triggered quantum dot photon-pair source without post-selection. Furthermore, the fidelity to the expected Bell state is increased above 90% using temporal gating to reject photons emitted at times when collection of uncorrelated light is more probable. A direct measurement of a CHSH Bell inequality is made showing a clear violation, highlighting that a quantum dot entangled photon source is suitable for communication exploiting nonlocal quantum correlations.