Clarendon Laboratory boosts atom-atom entanglement with cavity design

Researchers at Nanofiber Quantum Technologies, Inc. and the Clarendon Laboratory at the University of Oxford have developed a new protocol for generating entangled atom pairs. The work details a time- and wavelength-multiplexed approach using cavity-assisted photon scattering designed to achieve high fidelity and rate despite operational imperfections. The team predicts 2e5 s^-1 successful atom-atom Bell pair generation with a heralded fidelity of 0.999, even without resetting qubits within the cavity, a substantial improvement over existing two-photon interference methods. A light shift of Δa, achieved with moderate laser power, suppresses scattering error to approximately 10^-4, minimizing heating and decoherence of atoms during remote entanglement…