XCOM: Full Mesh Network Synchronization and Low-Latency Communication for QICK (Quantum Instrumentation Control Kit)
Diego Martin, Luis H. Arnaldi, Kenneth Treptow, Neal Wilcer, Sho Uemura, Sara Sussman, David I Schuster, Gustavo Cancelo

TL;DR
XCOM is a network system that achieves precise synchronization and low-latency communication across multiple quantum control boards, enabling scalable and reliable control for large quantum computing testbeds.
Contribution
It introduces XCOM, a scalable network that synchronizes quantum control hardware with 100 ps accuracy and provides deterministic low-latency communication.
Findings
Synchronization accuracy within 100 ps
Deterministic communication latency below 185 ns
Compatible with various qubit technologies
Abstract
Quantum computing experiments and testbeds with large qubit counts have until recently been a privilege afforded only to large companies or quantum technologies where scaling to hundreds or thousands of qubits does not require a substantial increase in quantum control hardware (neutral atoms, trapped ions, or spin defects). Superconducting and spin qubit testbeds critically depend on scaling their control systems beyond what a single electronics board can provide. Multi-board control systems combining RF, fast DC control, bias, and readout require precise synchronization and communication across many hardware and firmware components. To address this, we present XCOM, a network that synchronizes QICK boards and the absolute clocks governing quantum program execution to within 100 ps, free of drift and loss of lock. XCOM also provides deterministic, all-to-all simultaneous data…
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum and electron transport phenomena
