L00L entanglement and the twisted quantum eraser
- URL: http://arxiv.org/abs/2306.13620v3
- Date: Tue, 17 Oct 2023 11:01:18 GMT
- Title: L00L entanglement and the twisted quantum eraser
- Authors: Dylan Danese, Sabine Wollmann, Saroch Leedumrongwatthanakun, Will
McCutcheon, Manuel Erhard, William N. Plick, and Mehul Malik
- Abstract summary: We show the generation of unbalanced two-photon entanglement in the Laguerre-Gaussian (LG) transverse-spatial degree-of-freedom.
Taking a cue from the $N00N$ state nomenclature, we call these types of states $ell 00 ell$-entangled.
We find that our generated states have fidelities of 95.31% and 89.80% to their respective ideal maximally entangled states.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We demonstrate the generation of unbalanced two-photon entanglement in the
Laguerre-Gaussian (LG) transverse-spatial degree-of-freedom, where one photon
carries a fundamental (Gauss) mode and the other a higher-order LG mode with a
non-zero azimuthal ($\ell$) or radial ($p$) component. Taking a cue from the
$N00N$ state nomenclature, we call these types of states $\ell 00
\ell$-entangled. They are generated by shifting one photon in the LG mode space
and combining it with a second (initially uncorrelated) photon at a
beamsplitter, followed by coincidence detection. In order to verify two-photon
coherence, we demonstrate a two-photon ``twisted'' quantum eraser, where
Hong-Ou-Mandel interference is recovered between two distinguishable photons by
projecting them into a rotated LG superposition basis. Using an entanglement
witness, we find that our generated states have fidelities of 95.31\% and
89.80\% to their respective ideal maximally entangled states. Besides being of
fundamental interest, this type of entanglement will likely have a significant
impact on tickling the average quantum physicist's funny bone.
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