In fact , there now exist commercial quantum encryption devices whose operation depends fundamentally on the existence and behavior of spatially extended singlets .
The irony was that instead of disproving entanglement , which was Bell 's hope , subsequent experiments instead established the reality of entanglement .
There now exist commercial quantum encryption devices whose operation depends fundamentally on the existence and behavior of spatially extended singlets .
The irony was that instead of disproving entanglement , which was Bell 's hope , subsequent experiments instead established the reality of entanglement .