Physical synthesis in distributed quantum architectures

Abstract The inherent power of quantum computing in parallelizing computations makes it possible to solve some specific problems in a much shorter time than classical computing. Considering the physical issues governing this type of computing, one of the approaches to increase the scalability of such systems is using distributed quantum architectures. A quantum algorithm requires a quantum circuit for a successful implementation. The quantum circuit design flow comprises two main parts: logical synthesis and physical design. Physical synthesis is one of the main steps of the physical design. It improves circuit metrics such as latency and area by changing the netlist or the layout using the information obtained from the initial layout and scheduling. In this paper, we have presented a new physical synthesis method to reduce the quantum circuit delay in distributed architectures. It moves some gates from one partition to another to reduce the number of teleportation operations on the critical path using the scheduled layout information. The experimental results show that this method improves the delay of benchmark circuits on average by 33.40%.