Numerically solving a second quantised many-body model in the permutation symmetric Fock space can be challenging for two reasons: (i) an increased complication calculations of matrix elements various operators, and (ii) poor scaling cost these with size. We present method that solves both problems. find mapping used to simplify elements. The is directly generated so its computational scales on...

Relay-enabled backscatter communication (BC) is an intriguing paradigm to alleviate energy shortage and improve throughput of Internet-of-Things (IoT) devices. Most the existing works focus on resource allocation that considered unequal continuous time for both source-relay relay-destination links. However, may be infeasible since in practice, shall carried out integral multiple subframe durati...