Design and optimization of the physical-to-logical interface for detection-time-informed fidelity

Develop and optimize a physical-to-logical interface that maps on-the-fly estimates of motion-induced infidelity for each Bell pair—computed from photon detection-time information in cavity-assisted heralded entanglement generation—into inputs usable by logical-level quantum error-correcting code protocols such as entanglement-distillation decoding.

Background

The paper introduces a kick-operator model to quantify motion-induced infidelity in cavity-assisted heralded entanglement generation and shows that detection-time information can be used to estimate the infidelity of each produced Bell pair on the fly. The authors note that these estimates could be integrated into logical-level quantum error-correcting code protocols, for example, decoding steps in entanglement distillation.

They explicitly state that designing and optimizing the interface between the physical layer (which produces detection-time-based infidelity estimates) and the logical layer (which consumes such information for error correction and distillation) remains to be done. This interface is essential for system-level applications such as multiprocessor fault-tolerant quantum computing and quantum networking nodes.