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2011 AAPT Summer Meeting
July 30-August 3, 2011
Omaha, Nebraska

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Illustrating Quantum Non-Locality with the Two-Slit Interferometer
  Location: HC 3028
  Date: Monday, Aug.1
  Time: 7:00 PM -7:10 PM
  Author: Scott Johnson, Intel
  Co-Author(s): None
  Abstract: The classic demonstration of interference is the two-slit interferometer, so students are generally comfortable with this system and the calculations that go with it. This familiarity makes it a good system for illustrating new concepts, such as the non-local correlations seen in quantum entanglement. These can be illustrated with a modified interferometer that uses two sets of slits, one on each side of a source of momentum-entangled photons. (This actual system has not yet been realized, but a similar Mach-Zehnder interferometer has been constructed.) This system shows interference-like correlations between photons detected on opposite sides of the source, which can be very far away from each other. These correlations change with the spacing of both sets of slits, illustrating Einstein’s “spooky action at a distance.”
  Footnotes: None
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