Azimuthal backflow in light carrying orbital angular momentum
- URL: http://arxiv.org/abs/2304.13124v1
- Date: Tue, 25 Apr 2023 19:59:08 GMT
- Title: Azimuthal backflow in light carrying orbital angular momentum
- Authors: Bohnishikha Ghosh, Anat Daniel, Bernard Gorzkowski, Radek Lapkiewicz
- Abstract summary: M.V. Berry's work highlighted the correspondence between backflow in quantum mechanics and superoscillations in waves.
In this work, we examine the interference of classical light carrying only negative orbital angular momentum.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: M.V. Berry's work [J. Phys. A: Math. Theor. 43, 415302 (2010)] highlighted
the correspondence between backflow in quantum mechanics and superoscillations
in waves. Superoscillations refer to situations where the local oscillation of
a superposition is faster than its fastest Fourier component. This concept has
been used to demonstrate backflow in transverse linear momentum for optical
waves. In this work, we examine the interference of classical light carrying
only negative orbital angular momentum and observe in the dark fringes of such
an interference, positive local orbital angular momentum. This finding may have
implications for the studies of light-matter interaction and represents a step
towards observing quantum backflow in two dimensions.
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