Fair-sampling perspective published in PNAS

In the latest edition of PNAS, we report on the duality principle from the perspective of fair sampling. 

We bring the understanding of the duality principle a step forward by theoretically deriving the strongest relations between the visibility of an interference pattern and the which-way information in a two-way interferometer, such as Young's double slit.  This formalism successfully describes tests of duality where postselection on a subset of the data is applied.

Click here for a summary on phys.org