The New York State Quantum Internet Testbed (NYSQIT)

Testbed Infrastructure:

• Six nodes connected by ~300 km (185 mi) of dedicated dark fibers
• Equipped with quantum memories and entanglement sources
• Rack-mounted quantum equipment in several data centers
• Cross-network sub-nanosecond time synchronization
• Cross-network polarization compensation
• Open to external users as part of the BNL Quantum Network Facility

 

Entanglement Distribution Across 140 km

Currently, our NYSQIT team is performing entanglement distribution experiments using our purpose-built three-node quantum network connecting quantum nodes at the Brookhaven National Laboratory, Stony Brook University, and the RICOH Data Facility in Commack. This experiment is using state-of-the-art entanglement polarization sources, deployed superconducting nanowire detectors (SNSPD), and a quantum aware classical control network.

 

 

Matter-Matter Entanglement Creation

Additionally, our NYSQIT team is performing matter-matter entanglement creation experiments across a 158 km quantum network.This quantum network connects two telecom-compatible rubidium quantum memories located in two Stony Brook nodes and a Hong-Ou-Mandel interference station at Brookhaven National Laboratory. This network has pioneered the use of long-distance time-synchronization mechanisms, and long-distance polarization compensation systems that have allowed us to demonstrate indistinguishability measurements.