Entanglement spreads further thanks to energy leakage, study finds

A pair of superconducting qubits at the University of Illinois Urbana-Champaign and the University of Chicago have demonstrated that energy leakage, traditionally considered detrimental, can generate sustained quantum entanglement. Researchers realized this phenomenon, predicted by theory and recently published, using a new technique called synthetic squeezing. “In the past, generating entanglement meant performing operations on different parts of a system and then transporting them away from each other,” said Wolfgang Pfaff, Illinois Grainger Engineering assistant professor at the University of Illinois Urbana-Champaign. This new method bypasses that vulnerable transport stage, potentially offering a more reliable path to long-distance quantum communication.…