Second-order superposition operations via Hong-Ou-Mandel interference
Su-Yong Lee, Hyunchul Nha
TL;DR
This paper introduces an experimental scheme using Hong-Ou-Mandel interference to implement second-order nonlocal superposition operations, enabling high-particle-number NOON state generation and entanglement enhancement under realistic conditions.
Contribution
It presents a novel experimental approach for second-order superposition operations leveraging Hong-Ou-Mandel interference, with practical feasibility analysis.
Findings
High-particle-number NOON states can be heralded.
Entanglement properties of continuous variable states can be enhanced.
Scheme remains feasible with realistic detector and source imperfections.
Abstract
We propose an experimental scheme to implement a second-order nonlocal superposition operation and its variants by way of Hong-Ou-Mandel interference. The second-order coherent operations enable us to generate a NOON state with high particle number in a heralded fashion and also can be used to enhance the entanglement properties of continuous variable states. We discuss the feasibility of our proposed scheme considering realistic experimental conditions such as on-off photodetectors with nonideal efficiency and imperfect single-photon sources.
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