A SIMPLE semiconductor chip has been used to generate pairs of entangled photons, a vital step towards making quantum computers a reality.
Famously dubbed “spooky action at a distance” by Einstein, entanglement is the mysterious phenomenon of quantum particles whereby two particles such as photons behave as one regardless of how far apart they are. It is widely regarded as essential to the development of quantum computers and quantum cryptography.
To generate entangled photons, Andrew Shields at Toshiba Research Europe Limited (TREL) in Cambridge, UK, and colleagues from TREL and the University of Cambridge manufactured a silicon chip containing a…
