Cisco has announced the Cisco Universal Quantum Switch, a development in quantum networking technology aimed at addressing challenges in connecting different quantum systems.
Quantum systems use different methods to encode information, which can make inter-system communication difficult. Until now, systems have had difficulty handling multiple encoding modalities without affecting the integrity of quantum information. Cisco’s switch is designed to route quantum information while preserving its integrity, using a patented conversion engine.
The development reflects ongoing work in quantum networking, as current quantum computers operate with hundreds of qubits, while future applications in areas such as healthcare and aerospace are expected to require systems with significantly larger numbers of qubits. Cisco highlights networking as one approach to addressing scalability challenges.
The concept is compared to classical networking, where switches enabled scalable connectivity across early internet systems. In this context, the quantum switch is intended to support routing and translation of information between quantum systems to enable communication across different architectures.
The switch is designed to operate over existing telecom fibre at ambient temperatures, reducing the need for specialised cooling infrastructure. It supports major quantum encoding modalities including Polarization, Time-Bin, and Frequency-Bin. Initial experimental validation has been conducted with polarization encoding.
Reported experimental results include:
- Less than 4% degradation in quantum state fidelity and entanglement, indicating preservation of quantum state coherence
- Sub-nanosecond switching capabilities
- Power consumption of less than 1 milliwatt
The system is intended to support communication between different quantum systems and vendors by enabling interoperability across encoding types.
The switch forms part of Cisco’s broader work on a quantum networking architecture that includes hardware, software, and application layers.
