Super miniature Entangled-photon LEDs

Scientists in the UK have successfully scooped out the source for the future devices that emit entangled light. Andrew Shields at Toshiba and his fellow researchers at the University of Cambridge have created pairs of entangled photons from a nanoscale crystal of semiconductor known as a "quantum dot".

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The entangled photons have 70% more efficiency paving way for entangled light emitting devices to take over lasers and light-emitting diodes. Earlier research was able to churn out only 49% efficiency.

The underlying formula:

'Entanglement allows particles to have a much closer relationship than is possible in classical physics, and means that we can know the state of one photon by measuring the state of the other. For example, if one photon is horizontally polarized, then its entangled counterpart must have a vertically polarized spin, even if it is many kilometres away. In the source made by Shields and colleagues, correlation is seen for not only horizontal and vertical polarizations but also for all possible directions of polarization.'

Via: physicsweb