Technology

ORCA's nonlinear photonic architecture lets photons interact directly, removing key failure points of linear-optics approaches. The result is lower resource overheads and far greater tolerance to optical loss (around 12%), a significant step towards scalable, fault-tolerant quantum computing.

Many of ORCA's key technologies depend on strong interactions between light and rubidium atoms. This paper shows how a simple linear optical cavity can boost that interaction in a room-temperature quantum memory, cutting power requirements and device size by an order of magnitude. The compact design can be scaled into large arrays and points to a route towards single-photon optical nonlinearities.

Building fault-tolerant photonic quantum computers means understanding how real-world imperfections, such as photon loss and photons that aren't perfectly identical, affect large entangled states. This paper introduces a new simulation technique that models both errors together far more efficiently, shrinking one example problem by over 60 orders of magnitude. This enables the first-ever simulations of imperfect encoded photonic qubits.