Entanglement rate scales linearly with this new quantum interconnect

Jérémy Raskop and colleagues Labs Ltd, in collaboration with researchers from the Institute of Science and Technology Austria (ISTA), have demonstrated a quantum interconnect using a near-deterministic, robust photon–atom controlled-Z gate via a single atom trapped in a high-finesse cavity to mediate entanglement between modular processors. Unlike existing methods where entanglement rates scale quadratically with photon-delivery probability, this protocol achieves linear scaling over a wide range of parameters. This advancement removes a key bottleneck in modular quantum computing by allowing entanglement rates to increase with photon arrival probability. A new quantum interconnect uses a single atom to achieve a linear scaling of entanglement rate, a departure from the quadratic scaling that has limited previous designs. The system uses a near-deterministic, robust…