Chiral doublon bound states in a synthetic topological waveguide
Understanding the interactions between photons in nonlinear waveguide systems can lead to advancements in quantum networks.
We demonstrate the existence of a chiral bound state with a node at the coupling site and an exponentially localized wave function inherited from the SSH edge states.
Why this matters
Understanding the interactions between photons in nonlinear waveguide systems can lead to advancements in quantum networks. This research provides insights into engineering interactions that are crucial for future quantum technologies.
What they actually achieved
The researchers investigated a triangular ladder waveguide where strong nearest-neighbor interactions lead to the formation of a doublon bound state. They demonstrated the existence of a chiral bound state with an exponentially localized wave function resembling SSH edge states.
What they did not achieve
The study did not report experimental implementations or confirm these findings in a physical system. It also did not address the scalability of these interactions in larger, more complex systems.
Sources
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Chiral doublon bound states in a synthetic topological waveguide
arXiv quant-ph - 24 Aug 2026- primary