Lodahl develops interfaces between solid-state emitters and light, advancing photonic entanglement, programmable optical interactions and the building blocks of quantum networks and processors.
University of CopenhagenUniversity of Copenhagen / Nature CommunicationsUniversity of Copenhagen / Nature CommunicationsLodahl works on the point where matter can prepare, control and connect individual photons. His collaborations use quantum emitters in nanophotonic structures to generate entanglement and enable optical interactions that photons would not ordinarily provide by themselves. Recent experiments demonstrate temporal fusion of entangled resource states and programmable nonlinear circuits. These are concrete components for photonic computing and networking, rather than claims that a complete large-scale photonic computer has already been assembled.
University of CopenhagenUniversity of Copenhagen / Nature CommunicationsUniversity of Copenhagen / Nature CommunicationsDefining contributions
Work, in context- 2025
Fusing photonic resource states in time
Lodahl coauthored a demonstration that combines entangled resource states generated through a solid-state spin-photon interface. Repeated operation and temporal fusion provide a route to building larger entangled photonic systems from reusable physical resources.
Coauthor and corresponding author of the temporal-fusion paper; the experiment is a team contribution.
Source-supported recordUniversity of Copenhagen / Nature Communications - 2025
Programming interactions between individual photons
Lodahl and collaborators demonstrated circuits combining programmable linear and nonlinear photonic operations. A tunable quantum dot in a nanophotonic waveguide mediates interactions, with experiments including simulations of anharmonic molecular dynamics.
Coauthor of the programmable nonlinear photonics paper; the demonstrated circuits and simulations belong to the full team.
Source-supported recordUniversity of Copenhagen / Nature Communications
Keep in perspective
Component experiments are distinguished from a complete scalable photonic computer.
Follow the evidence
3 sourcesPrimary papers, institutional records and attributed announcements. Each source supports the claims linked above.
- University of Copenhageninstitutional profile
Peter Lodahl
Current professor, Niels Bohr Institute and Copenhagen work base.
Checked 2026-09-19 - University of Copenhagen / Nature Communicationsresearch paper
Temporal fusion of entangled resource states from a quantum emitter
Authorship, spin-photon resource generation and temporal fusion demonstration.
Published 2025-08-15 · Checked 2026-09-19 - University of Copenhagen / Nature Communicationsresearch paper
Programmable nonlinear quantum photonic circuits
Authorship, tunable quantum dot, programmable nonlinear operations and molecular-dynamics demonstration.
Published 2025-12-11 · Checked 2026-09-19