India, Dec. 4 -- Photonic quantum chip is widely seen as a key pathway toward the practical deployment of optical quantum information technologies. Today's mainstream photonic quantum chips typically rely on probabilistic single-photon sources generated through nonlinear optical processes, but the certain probability property of photons will lead to low emission efficiency and make the preparation of multi-photon qubits extremely challenging.

In contrast, solid-state atoms feature atom-like two-level structures that enable deterministic, highly efficient single-photon emission-an ideal foundation for on-chip multi-photon qubit generation. However, solid-state quantum emitters face major hurdles, including inhomogeneous spectral broadenin...