Bell-inequality violation with a triggered photon-pair source.
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.
Young
R J
RJ
Toshiba Research Europe Limited, 208 Cambridge Science Park, Cambridge CB4 0GZ, United Kingdom. aps@r-j-y.com
Stevenson
R M
RM
Hudson
A J
AJ
Nicoll
C A
CA
Ritchie
D A
DA
Shields
A J
AJ