High-dimensional topological photonic entanglement
Summary
The generation and manipulation of high-dimensional quantum states lies at the heart of modern quantum computation. The use of topology to resiliently encode and transport quantum information has been widely investigated in condensed matter and has recently penetrated quantum photonics. However, a route to scale up to a large number of entangled topological photonic modes has been missing. In this work, we demonstrate a method to generate high-dimensional topological photonic entanglement.
Content
# High-dimensional topological photonic entanglement
*Published: 2026 Mar 26*
The generation and manipulation of high-dimensional quantum states lies at the
heart of modern quantum computation. The use of topology to resiliently encode
and transport quantum information has been widely investigated in condensed
matter and has recently penetrated quantum photonics. However, a route to scale
up to a large number of entangled topological photonic modes has been missing.
In this work, we demonstrate a method to generate high-dimensional topological
photonic entanglement. Our platform relies on designed silicon photonic
waveguide topological superlattices, which support nonlinear generation of
energy-time-entangled photon pairs on a superposition of multiple topological
modes. We show strong signatures of entanglement of up to five topological modes
with resilience to nanofabrication imperfections, providing a route toward
scalable, fault-tolerant quantum photonic states.
DOI: 10.1126/science.aec1344