White Rabbit technology delivers sub-nanosecond synchronization accuracy with picosecond precision for large distributed systems. Developed by CERN, this solution enables deterministic and reliable data delivery across networks connecting thousands of nodes with typical distances of 10km between them. The system allows precise time-tagging of measured data and synchronized triggering of data acquisition across massive installations while using the same network for data transmission.

The technology operates over Ethernet-based gigabit networks, providing robust data transfer capabilities. What sets White Rabbit apart is its fully open approach across hardware, firmware, and software, allowing multi-vendor compatibility. This openness has led to commercially produced hardware adoption in research facilities worldwide. Recent developments include the eRTM board, a WR node with jitter below 100 femtoseconds, representing the most precise implementation of White Rabbit technology to date.

CERN continues to advance White Rabbit through job opportunities for FPGA developers working on switch v4 and other projects. The technology has become essential for scientific experiments requiring extreme timing precision across distributed systems. With femtosecond-level precision becoming increasingly accessible through open-source implementations, White Rabbit represents a critical enabler for next-generation research infrastructure in physics and beyond.