Breaking Memory Bottlenecks in Quantum Control Systems for More Precise Experiments and Higher Throughput Computing
2026-08-06 • Hardware Architecture
Hardware ArchitectureEmerging Technologies
AI summaryⓘ
The authors address a memory bottleneck in quantum control systems caused by limited fast memory (BRAM) and unpredictable slower memory (DRAM). They designed Ant-Q, a new memory setup that uses both DRAM and BRAM together to run quantum circuits smoothly and on time. Testing with various real quantum circuits showed that Ant-Q significantly reduces delays in circuit loading and data readout. Their design helps run complex experiments more efficiently and is being added to a quantum control platform called QubiC 3.0.
quantum computingquantum control systemBRAMDRAMmemory hierarchyquantum circuitsRandomized BenchmarkingQubiCcircuit execution latencypipelining
Authors
Yicheng Guang, Neel Vora, Yilun Xu, Yueqi Chen, Gang Huang
Abstract
As quantum computing continues to demonstrate promise and attract growing attention, there is an increasing need for more precise experiments to advance the development of quantum devices, as well as higher circuit throughput to validate more domain applications. However, this need is hindered by a memory bottleneck at the quantum control system layer, arising from limited on-chip BRAM capacity and the non-deterministic latency of DRAM. To break this bottleneck, we present Ant-Q, a memory hierarchy design that integrates DRAM with BRAM to support pipelined quantum circuit execution while ensuring deterministic inter-circuit timing. We evaluated Ant-Q using 26 real-world experimental and computing circuits. The results show that Ant-Q supports deep circuits for 1Q and 2Q Randomized Benchmarking and reduces the overhead of circuit loading and readout uplink relative to execution time from 22.90%-1417.05% to near zero. Ant-Q is being integrated into QubiC 3.0, with part of its functionalities already available.