OSA Rochester Section

The origin of the quantum entanglement experiments and space-to-space interferometric communications.

  • April 05, 2016
  • 7:00 PM
  • UR/ LLE East Lobby

Title: Quantum entanglement and space-to-space interferometric communications.  



F. J. Duarte is a laser physicist based in Western New York.  He is the author of several well-known books on tunable lasers and quantum optics.  His book titles are held in more than 3000 libraries world wide.  Duarte is a fellow of the Australian Institute of Physics and a fellow of the Optical Society.   


Abstract:  The origin of quantum entanglement polarization experiments is traced back to the physics literature of the mid-late 1940s.  Here, we examine the genesis of the conceptual-theoretical and, experimental, configurations that introduced the notion of entangled polarization measurements of quanta traveling in opposite directions. Furthermore, the essential role of interference in the derivation of the ubiquitous equation for the probability amplitude of entangled polarizations, for quanta propagating in opposite directions, is examined. 


The interferometric basis of quantum entanglement can be shown to be the same as the interferometric basis of N-slit interferometry.  In this presentation we explain how N-slit interferometry is applied to generate interferometric characters (or symbols) for secure space-to-space communications.  Furthermore, significant advantages of using  populations of indistinguishable photons, that is, low-noise narrow-linewidth laser emission,  rather than single photons, in secure space-to-space communications are highlighted.  Results using large (30 m) and very-large (more than 500 m) N-slit laser interferometers are described.  Finally, propagation calculations assuming state-of-the-art lasers, optics, and photonics are used to outline a futuristic satellite network utilizing long-distance secure interferometric communications.


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