The shape and polarization of a conventional laser beam from a laser pointer mimics quantum entanglement when the laser beam has a polarization dependent shape. This can be used to encode twice as many bits of information as when the laser beam is “separable.” Credit: Giovanni Milione
In a classic eureka moment, a team of physicists is showing how beams from ordinary laser pointers mimic quantum entanglement with the potential of doubling the data speed of laser communication. Described by Albert Einstein as “spooky action at a distance,” when two quantum things are entangled, if one is ‘touched’ the other will ‘feel it,’ even if separated by a great distance.
“At the heart of quantum entanglement is ‘nonseparability’ — two entangled things are described by an unfactorizable equation,” sai...
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