Cisco Unveils Universal Quantum Switch Preserving Fidelity Within 4% at Room Temperature
Cisco’s Universal Quantum Switch prototype routes quantum information between different vendor systems at room temperature over standard telecom fiber, using a patented conversion engine. In tests it preserved encoding and entanglement fidelity with less than 4% degradation and performed sub-nanosecond switching while consuming under 1 milliwatt of power.
1. Prototype Design and Capabilities
The Universal Quantum Switch prototype routes quantum information between systems from multiple vendors at room temperature over standard telecom fiber. Its patented conversion engine can translate among all major quantum encoding modalities — polarization, time-bin, frequency-bin, and path — without destroying the information.
2. Proof-of-Concept Experimental Results
Proof-of-concept experiments used entanglement sources and single-photon detectors to demonstrate less than 4% degradation in quantum state fidelity and entanglement. The device achieved sub-nanosecond electro-optic switching and consumed under 1 milliwatt of power, indicating high speed and energy efficiency.
3. Infrastructure Compatibility
Room-temperature operation and compatibility with existing telecom infrastructure eliminate the need for cryogenic cooling or specialized equipment. This enables organizations to connect quantum devices from different vendors without locking into proprietary ecosystems.
4. Next Steps and Validation
Support for polarization encoding has been experimentally validated, with time-bin and frequency-bin support built into the design for upcoming tests. Full findings will be published in a research paper, while Cisco plans further validation to advance its quantum networking program toward scalable deployments.