Experimental Higher-Order Interference in a Nonlinear Triple Slit
- URL: http://arxiv.org/abs/2112.06965v1
- Date: Mon, 13 Dec 2021 19:05:38 GMT
- Title: Experimental Higher-Order Interference in a Nonlinear Triple Slit
- Authors: Peter Namdar, Philipp K. Jenke, Irati Alonso Calafell, Alessandro
Trenti, Milan Radonji\'c, Borivoje Daki\'c, Philip Walther, Lee A. Rozema
- Abstract summary: We experimentally show that nonlinear evolution can in fact lead to higher-order interference.
Our work shows that nonlinear evolution could open a loophole for experiments attempting to verify Born's rule by ruling out higher-order interference.
- Score: 50.591267188664666
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Interference between two waves is a well-known concept in physics, and its
generalization to more than two waves is straight-forward. The order of
interference is defined as the number of paths that interfere in a manner that
cannot be reduced to patterns of a lower order. In practice, second-order
interference means that in, say, a triple-slit experiment, the interference
pattern when all three slits are open can be predicted from the interference
patterns between all possible pairs of slits. Quantum mechanics is often said
to only exhibit second-order interference. However, this is only true under
specific assumptions, typically single-particles undergoing linear evolution.
Here we experimentally show that nonlinear evolution can in fact lead to
higher-order interference. The higher-order interference in our experiment has
a simple quantum mechanical description; namely, optical coherent states
interacting in a nonlinear medium. Our work shows that nonlinear evolution
could open a loophole for experiments attempting to verify Born's rule by
ruling out higher-order interference.
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