Integrated optics provides a versatile platform for quantum information processing and transceiving with photons^{1,2,3,4,5,6,7,8}. The implementation of quantum protocols requires the capability to generate multiple high-quality single photons and process photons with multiple high-fidelity operators^9,10,11. However, previous experimental demonstrations were faced by major challenges in realizing sufficiently high-quality multi-photon sources and multi-qubit operators in a single integrated system^4,5,6,7,8, and fully chip-based implementations of multi-qubit quantum tasks remain a significant challenge^1,2,3. Here, we report the demonstration of chip-to-chip quantum teleportation and genuine multipartite entanglement, the core functionalities in quantum technologies, on silicon-photonic circuitry. Four single photons with high purity and indistinguishablity are produced in an array of microresonator sources, without requiring any spectral filtering. Up to four qubits are processed in a reprogrammable linear-optic quantum circuit that facilitates Bell projection and fusion operation. The generation, processing, transceiving and measurement of multi-photon multi-qubit states are all achieved in micrometre-scale silicon chips, fabricated by the complementary metal–oxide–semiconductor process. Our work lays the groundwork for large-scale integrated photonic quantum technologies for communications and computations.

It seemed as if AWS was lagging behind Google, Microsoft, and IBM when it comes to quantum computing but they’ve finally taken a step forward with their latest announcement.

AWS has officially announced the preview launch of its first-ever quantum computing service known as Braket. However, AWS is still not building their own quantum computer. Instead, they chose to partner with IonQ, Rigetti, and D-Wave in providing computing services through the cloud.