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Distributed quantum computing (DQC) is a promising approach to extending thecomputational power of near-term quantum devices. However, the non-localquantum communication between quantum devices is much more expensive anderror-prone than the local quantum communication within each quantum device.Previous work on the DQC communication optimization focus on optimizing thecommunication protocol for each individual non-local gate and then adoptquantum compilation designs which are designed for local multi-qubit gates(such as controlled-x or CX gates) in a single quantum computer. Thecommunication patterns in distributed quantum programs are not yet wellstudied, leading to a far-from-optimal communication cost. In this paper, weidentify burst communication, a specific qubit-node communication pattern thatwidely exists in many distributed programs and can be leveraged to guidecommunication overhead optimization. We then propose AutoComm, an automaticcompiler framework to first extract the burst communication patterns from theinput programs, and then optimize the communication steps of burstcommunication discovered. Experimental results show that our proposed AutoCommcan reduce the communication resource consumption and the program latency by75.6% and 71.4% on average, respectively.

AutoComm: A Framework for Enabling Efficient Communication in Distributed Quantum Programs