Quantum Computation Gets a Feedback Boost

The system explores a boson sampling scheme enhanced with optical feedback, represented by an interferometer’s transmission matrix $UU$, and extends this to a conventional boson sampler framework by depicting all spatiotemporal modes within a total transfer matrix $U_{total}$.

Researchers have experimentally demonstrated a new technique that enhances the complexity of photonic quantum computation using optical feedback, potentially simplifying the path to scalable quantum systems.