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That Twist That Entangles All

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In a study to appear in Physical Review Letters [1], researchers report that entangled photons traveling in corkscrew paths have resulted in holograms that offer the possibility of dense and ultrasecure data encryption.

By Dr. Inés Urdaneta, Physicist at Resonance Science Foundation

Commonly, there are two ways of having light carry information: through its polarization and through its angular momentum, in particular its orbital angular momentum (OAM).

The polarization concerns the geometrical orientation of light’s electromagnetic wave oscillations (of the electric and magnetic components of light). As explained in our former RSF article The origin of quantum mechanics I: The Electromagnetic field as a wave, an electromagnetic wave such as light (also known as electromagnetic radiation or EMR) consists of a coupled oscillating electric field and magnetic field which are always...

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